Chemical and physical changes
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The document discusses the differences between physical and chemical changes, noting that a physical change alters the object's appearance or structure but not its chemical composition, while a chemical change produces one or more new substances through breaking and forming of chemical bonds. Examples of physical changes include changes in shape, size, or state of matter, while chemical changes involve chemical reactions like burning, rusting, or decomposition. Evidence of a chemical change may include color changes, gas formation, or changes in physical properties.
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Chemcial reactions
Physical changes alter a substance's physical properties but do not change its chemical composition. Chemical changes produce new substances with different chemical properties. A physical change is usually reversible while a chemical change produces new substances that cannot easily be reversed back to the original ones. Some examples of physical changes include changes of state from solid to liquid to gas, dissolving, and changes in shape or size. Chemical changes include burning, rusting, and cooking.
Physical and chemical change
This document summarizes different types of chemical and physical changes. It describes physical changes as changes in a substance's form or state without altering its chemical composition. Chemical changes form new substances through rearrangement of atoms. The document outlines various chemical reactions including synthesis, decomposition, combustion, single and double displacement, precipitation, and acid-base reactions. It emphasizes that chemical equations represent chemical reactions and must balance the number and type of atoms on each side.
Chapter 5 chemical changes
This document discusses different types of chemical and physical changes. It explains that physical changes only alter the physical properties of a substance and are reversible, while chemical changes produce new substances through irreversible reactions and often require more energy. Examples of each type of change are provided. The document also covers endothermic and exothermic reactions, noting that endothermic reactions absorb heat while exothermic reactions release heat.
Chemical reaction and equation
This document discusses chemical reactions and equations. It defines chemical reactions as changes where reactants are converted into different products. It explains the use of chemical equations to represent reactions through formulas and symbols. It also describes different types of chemical reactions such as combination, decomposition, displacement, redox, and precipitation reactions.
Physical vs chemical changes notes
Physical changes alter a substance's appearance or structure but do not change its chemical composition. Examples include melting, freezing, and dissolving. Chemical changes form new substances with different properties through rearrangement of atoms, as seen in rusting, burning, and cooking. Evidence of a chemical change may include production of a gas, change in temperature, formation of a precipitate, or color change. A chemical change can be confirmed if the products of a chemical equation are different from the reactants.
Physical and chemical changes
The document discusses physical and chemical changes. Physical changes alter the state of a substance but do not create a new substance, such as melting, freezing, or breaking something into smaller pieces. Chemical changes form an entirely new substance, evidenced by a change in color, gas release, or new solid forming. Examples of physical changes include shattering a plate or melting wax, while examples of chemical changes include burning wood or rusting metal.
Chemical properties
Chemical properties describe how a substance reacts or changes during a chemical reaction. Some key chemical properties include flammability, reactivity, and the ability to undergo chemical changes that alter the composition of the substance. Common signs that a chemical change has occurred include a change in color, production of a gas, or formation of a precipitate. However, physical changes can sometimes exhibit similar signs, so the only definitive way to identify a chemical change is if the composition of the substance changes to form new substances.
Physical or chemical changes
This document discusses the differences between physical and chemical changes. A physical change alters the form of a substance but does not change its chemical composition, while a chemical change transforms a substance into one with different properties. Some signs of a chemical change include color changes, precipitation, gas production, temperature changes, and changes in characteristic properties like odor. Examples are provided of changes that are physical, like cutting paper or a disappearing puddle, versus those that are chemical, such as burning toast or rocket fuel.
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Chemcial reactions
Physical changes alter a substance's physical properties but do not change its chemical composition. Chemical changes produce new substances with different chemical properties. A physical change is usually reversible while a chemical change produces new substances that cannot easily be reversed back to the original ones. Some examples of physical changes include changes of state from solid to liquid to gas, dissolving, and changes in shape or size. Chemical changes include burning, rusting, and cooking.
Physical and chemical change
This document summarizes different types of chemical and physical changes. It describes physical changes as changes in a substance's form or state without altering its chemical composition. Chemical changes form new substances through rearrangement of atoms. The document outlines various chemical reactions including synthesis, decomposition, combustion, single and double displacement, precipitation, and acid-base reactions. It emphasizes that chemical equations represent chemical reactions and must balance the number and type of atoms on each side.
Chapter 5 chemical changes
This document discusses different types of chemical and physical changes. It explains that physical changes only alter the physical properties of a substance and are reversible, while chemical changes produce new substances through irreversible reactions and often require more energy. Examples of each type of change are provided. The document also covers endothermic and exothermic reactions, noting that endothermic reactions absorb heat while exothermic reactions release heat.
Chemical reaction and equation
This document discusses chemical reactions and equations. It defines chemical reactions as changes where reactants are converted into different products. It explains the use of chemical equations to represent reactions through formulas and symbols. It also describes different types of chemical reactions such as combination, decomposition, displacement, redox, and precipitation reactions.
Physical vs chemical changes notes
Physical changes alter a substance's appearance or structure but do not change its chemical composition. Examples include melting, freezing, and dissolving. Chemical changes form new substances with different properties through rearrangement of atoms, as seen in rusting, burning, and cooking. Evidence of a chemical change may include production of a gas, change in temperature, formation of a precipitate, or color change. A chemical change can be confirmed if the products of a chemical equation are different from the reactants.
Physical and chemical changes
The document discusses physical and chemical changes. Physical changes alter the state of a substance but do not create a new substance, such as melting, freezing, or breaking something into smaller pieces. Chemical changes form an entirely new substance, evidenced by a change in color, gas release, or new solid forming. Examples of physical changes include shattering a plate or melting wax, while examples of chemical changes include burning wood or rusting metal.
Chemical properties
Chemical properties describe how a substance reacts or changes during a chemical reaction. Some key chemical properties include flammability, reactivity, and the ability to undergo chemical changes that alter the composition of the substance. Common signs that a chemical change has occurred include a change in color, production of a gas, or formation of a precipitate. However, physical changes can sometimes exhibit similar signs, so the only definitive way to identify a chemical change is if the composition of the substance changes to form new substances.
Physical or chemical changes
This document discusses the differences between physical and chemical changes. A physical change alters the form of a substance but does not change its chemical composition, while a chemical change transforms a substance into one with different properties. Some signs of a chemical change include color changes, precipitation, gas production, temperature changes, and changes in characteristic properties like odor. Examples are provided of changes that are physical, like cutting paper or a disappearing puddle, versus those that are chemical, such as burning toast or rocket fuel.
States and Changes (Matter)
The document discusses the four states of matter - solid, liquid, gas, and plasma. Solids have tightly packed particles that vibrate in a fixed position. Liquids have particles that are tightly packed but can slide over one another. Gases have particles that are far apart and move freely. Plasma is an ionized gas with electrically charged particles. Phase changes between the different states of matter occur when energy is added or removed, causing the particles to change their arrangement and movement. Physical changes alter a substance's properties but not its chemical makeup, while chemical changes create new substances.
Physical and chemical changes
Physical and Chemical changes, Class 7th ncert based, Elements and compounds, properties of compounds,chemical reaction,crystallisation
chemical and phsical changes
1) The document discusses physical and chemical changes, providing examples of each from everyday life.
2) A physical change alters a substance's physical properties like shape, size, or state but does not create new substances. It is generally reversible.
3) A chemical change produces new substances through chemical reactions. It is accompanied by changes in heat, light, smell, color or gas production and is not reversible. Common examples are burning, rusting, and food spoilage.
chemical changes NCERT CLASS 7 CHAPTER 6
This document discusses physical and chemical changes, using the burning of magnesium ribbon as an example of a chemical change. It notes that a chemical change results in a new substance being formed, is irreversible, and can produce heat, light, gases or smells. When magnesium ribbon burns in oxygen, it forms magnesium oxide, a white ash, demonstrating that a new substance is created in a chemical reaction.
Physical & chemical changes oh my
Here are the answers:
1) Cutting Grass - Physical
2) Burning Toast - Chemical
3) Wadding up Homework - Physical
4) Ice Cream Melting - Physical
5) Frying an Egg - Chemical
6) Gasoline Combustion - Chemical
7) Sweat Evaporating - Physical
Physical & chemical changes
This document discusses physical and chemical changes. It defines physical changes as changes that affect physical properties but do not form new substances, while chemical changes form new substances with different properties and identities. Examples of physical changes given include state changes like melting and dissolving, while chemical changes include cooking, burning, and rusting. Signs that a chemical change is occurring include changes in color, odor, production of heat, fizzing or bubbling, sound, and light. The document asks readers to identify examples as physical or chemical changes.
Unit b matter and chemical change notes(physical & chemical changes)
Physical changes alter a substance's state but not its chemical composition, allowing separation back into original substances like melting ice cream. Chemical changes form new substances that are different from reactants, identified by a change in color, odor, formation of solids or gases, or release of energy like light and heat. Physical and chemical changes are distinguished by whether the original substances can be recovered after the change.
Physical vs chemical change
Physical changes alter the size, shape, or form of matter but do not create new substances, and can often be reversed, such as freezing and melting water or chopping celery. Chemical changes result in new substances through molecular rearrangements that cannot be undone, like rust forming on nails, fireworks exploding, or cookies baking. Chemical reactions exhibit telltale signs like producing gas, releasing heat, forming precipitates, or causing color changes.
Physical & chemical change
Physical changes alter a substance's physical properties but do not create new substances, and are typically reversible. Melting ice into water is a physical change that can be reversed by freezing the water back into ice. Dissolving salt into water is also a physical change, as the salt can be retrieved by evaporating the water. Chemical changes form new substances through chemical reactions, with the new substances possessing different chemical properties and changes often not being reversible.
physical_and_chemical changes
This document discusses physical and chemical properties and changes in matter. It defines physical properties as those that can be observed without changing a substance's identity, and chemical properties as those involving a change in identity to produce a new substance. Physical changes alter a substance's form or state without changing its identity, while chemical changes produce a new substance. Examples of each type of change are provided.
TYPES OF CHEMICAL REACTIONS
This document discusses 5 types of chemical reactions: composition, decomposition, single replacement, double replacement, and combustion reactions. It provides examples of each type of reaction and asks the reader to write balanced chemical equations for additional examples to practice each reaction type. The objectives are to be able to classify reactions, predict products, use the activity series to determine replacement reactions, and write balanced equations for double replacement and combustion reactions.
Chemical and Physical Changes
A physical change alters a substance's physical properties like shape, size, or state, but does not create new substances. A chemical change produces new substances through chemical reactions, altering both physical and chemical properties. Some key differences are that physical changes are typically reversible without new substances forming, while chemical changes are permanent reactions that form new substances through energy absorption or release. Rusting of iron is a chemical change that occurs when iron reacts with oxygen and water in the air, forming hydrated iron oxide (rust) which damages the iron over time.
Physical and Chemical Changes
Physical changes involve a change in a substance's physical properties but no new substance is formed. Chemical changes result in a new substance being formed through a chemical reaction. Some examples of physical changes include folding paper, melting wax, and freezing water. Chemical changes include burning paper, the reaction of vinegar and baking soda, and rusting of iron. A key difference is that physical changes are typically reversible while chemical changes produce new substances that cannot be reversed back to the original.
Physical and chemical changes
This presentation is about the changes which we see in our day to day lives. These changes are classified into two types. Physical And Chemical Changes
Changes matter undergoes
This document discusses physical and chemical changes. It defines physical changes as changes where the substance does not change identity, and chemical changes as changes where the substance is transformed into a new substance. It provides examples of physical changes like melting ice cream and chemical changes like burning a candle. It also discusses how physical and chemical changes are relevant to collecting evidence at crime scenes.
Physical and chemical changes
This document discusses physical and chemical changes. It defines physical changes as changes in a substance's appearance or state without producing a new substance. Chemical changes produce new substances through chemical reactions. Examples of each type of change are provided, along with activities and demonstrations to illustrate the differences between physical and chemical changes. Key terms related to changes in matter are also defined.
Chemistry Unit 2 Part 2 - Changes in Matter
This document discusses physical and chemical changes in matter and provides examples to help students understand the key differences:
- Physical changes alter the physical properties of a substance without changing its chemical composition, such as changes of state between solid, liquid and gas, or cutting and crushing.
- Chemical changes involve chemical reactions that alter the molecular structure and create new substances, like rusting, burning, or digestion.
- The rock cycle and digestion process involve both physical changes (breaking rocks or movement through the digestive system) and chemical changes (chemical weathering or digestion of food).
Compounds & Elements
This document defines key chemistry concepts including matter, mixtures, pure substances, elements, and compounds. It states that matter is anything that has mass and takes up space. Mixtures are combinations of two or more substances that are not chemically combined, while pure substances are either elements or compounds. Elements are the simplest forms of matter that cannot be broken down further, while compounds are formed by two or more elements that are chemically bonded together. The document provides examples of each term and guidelines for identifying elements and compounds based on changes in mass during chemical reactions.
2.3 Notes
Chemical properties can only be observed when a substance changes into a different substance through chemical reactions. Common chemical properties include flammability, which is a substance's ability to burn, and reactivity, which is how readily it combines with other substances. Chemical changes can be identified by a change in color, production of a gas, or formation of a precipitate, and result in a change to the composition of the substance.
Physical and chemical changes
Changes in matter are classified into physical and chemical changes.Physical Changes are those in which the identifying properties of substances remain unchanged. Chemical Changes are those in which new substances with new properties are formed.
Chemical and physical changes PPT Bigger version
The butterfly life cycle is most similar to a chemical change because during the life cycle the organism fundamentally changes from one type of being (egg, larva, pupa) into another distinct type of being (adult butterfly). This represents a change in identity or substance, which is characteristic of a chemical change.
Chemical and physical properties power point.ppt
This document discusses the differences between physical and chemical properties and changes in matter. It states that all matter has two types of properties - physical and chemical. Physical properties can be observed without changing the substance, such as mass, state, and texture. Chemical properties can only be observed by changing the substance, like its ability to burn or react. A physical change alters the substance's form or shape but not its identity, while a chemical change creates a new substance through breaking or forming of bonds. Evidence of physical changes includes alterations in size or phase, and of chemical changes includes color or odor changes.
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The document discusses the four states of matter - solid, liquid, gas, and plasma. Solids have tightly packed particles that vibrate in a fixed position. Liquids have particles that are tightly packed but can slide over one another. Gases have particles that are far apart and move freely. Plasma is an ionized gas with electrically charged particles. Phase changes between the different states of matter occur when energy is added or removed, causing the particles to change their arrangement and movement. Physical changes alter a substance's properties but not its chemical makeup, while chemical changes create new substances.
Physical and chemical changes
Physical and Chemical changes, Class 7th ncert based, Elements and compounds, properties of compounds,chemical reaction,crystallisation
chemical and phsical changes
1) The document discusses physical and chemical changes, providing examples of each from everyday life.
2) A physical change alters a substance's physical properties like shape, size, or state but does not create new substances. It is generally reversible.
3) A chemical change produces new substances through chemical reactions. It is accompanied by changes in heat, light, smell, color or gas production and is not reversible. Common examples are burning, rusting, and food spoilage.
chemical changes NCERT CLASS 7 CHAPTER 6
This document discusses physical and chemical changes, using the burning of magnesium ribbon as an example of a chemical change. It notes that a chemical change results in a new substance being formed, is irreversible, and can produce heat, light, gases or smells. When magnesium ribbon burns in oxygen, it forms magnesium oxide, a white ash, demonstrating that a new substance is created in a chemical reaction.
Physical & chemical changes oh my
Here are the answers:
1) Cutting Grass - Physical
2) Burning Toast - Chemical
3) Wadding up Homework - Physical
4) Ice Cream Melting - Physical
5) Frying an Egg - Chemical
6) Gasoline Combustion - Chemical
7) Sweat Evaporating - Physical
Physical & chemical changes
This document discusses physical and chemical changes. It defines physical changes as changes that affect physical properties but do not form new substances, while chemical changes form new substances with different properties and identities. Examples of physical changes given include state changes like melting and dissolving, while chemical changes include cooking, burning, and rusting. Signs that a chemical change is occurring include changes in color, odor, production of heat, fizzing or bubbling, sound, and light. The document asks readers to identify examples as physical or chemical changes.
Unit b matter and chemical change notes(physical & chemical changes)
Physical changes alter a substance's state but not its chemical composition, allowing separation back into original substances like melting ice cream. Chemical changes form new substances that are different from reactants, identified by a change in color, odor, formation of solids or gases, or release of energy like light and heat. Physical and chemical changes are distinguished by whether the original substances can be recovered after the change.
Physical vs chemical change
Physical changes alter the size, shape, or form of matter but do not create new substances, and can often be reversed, such as freezing and melting water or chopping celery. Chemical changes result in new substances through molecular rearrangements that cannot be undone, like rust forming on nails, fireworks exploding, or cookies baking. Chemical reactions exhibit telltale signs like producing gas, releasing heat, forming precipitates, or causing color changes.
Physical & chemical change
Physical changes alter a substance's physical properties but do not create new substances, and are typically reversible. Melting ice into water is a physical change that can be reversed by freezing the water back into ice. Dissolving salt into water is also a physical change, as the salt can be retrieved by evaporating the water. Chemical changes form new substances through chemical reactions, with the new substances possessing different chemical properties and changes often not being reversible.
physical_and_chemical changes
This document discusses physical and chemical properties and changes in matter. It defines physical properties as those that can be observed without changing a substance's identity, and chemical properties as those involving a change in identity to produce a new substance. Physical changes alter a substance's form or state without changing its identity, while chemical changes produce a new substance. Examples of each type of change are provided.
TYPES OF CHEMICAL REACTIONS
This document discusses 5 types of chemical reactions: composition, decomposition, single replacement, double replacement, and combustion reactions. It provides examples of each type of reaction and asks the reader to write balanced chemical equations for additional examples to practice each reaction type. The objectives are to be able to classify reactions, predict products, use the activity series to determine replacement reactions, and write balanced equations for double replacement and combustion reactions.
Chemical and Physical Changes
A physical change alters a substance's physical properties like shape, size, or state, but does not create new substances. A chemical change produces new substances through chemical reactions, altering both physical and chemical properties. Some key differences are that physical changes are typically reversible without new substances forming, while chemical changes are permanent reactions that form new substances through energy absorption or release. Rusting of iron is a chemical change that occurs when iron reacts with oxygen and water in the air, forming hydrated iron oxide (rust) which damages the iron over time.
Physical and Chemical Changes
Physical changes involve a change in a substance's physical properties but no new substance is formed. Chemical changes result in a new substance being formed through a chemical reaction. Some examples of physical changes include folding paper, melting wax, and freezing water. Chemical changes include burning paper, the reaction of vinegar and baking soda, and rusting of iron. A key difference is that physical changes are typically reversible while chemical changes produce new substances that cannot be reversed back to the original.
Physical and chemical changes
This presentation is about the changes which we see in our day to day lives. These changes are classified into two types. Physical And Chemical Changes
Changes matter undergoes
This document discusses physical and chemical changes. It defines physical changes as changes where the substance does not change identity, and chemical changes as changes where the substance is transformed into a new substance. It provides examples of physical changes like melting ice cream and chemical changes like burning a candle. It also discusses how physical and chemical changes are relevant to collecting evidence at crime scenes.
Physical and chemical changes
This document discusses physical and chemical changes. It defines physical changes as changes in a substance's appearance or state without producing a new substance. Chemical changes produce new substances through chemical reactions. Examples of each type of change are provided, along with activities and demonstrations to illustrate the differences between physical and chemical changes. Key terms related to changes in matter are also defined.
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This document discusses physical and chemical changes in matter and provides examples to help students understand the key differences:
- Physical changes alter the physical properties of a substance without changing its chemical composition, such as changes of state between solid, liquid and gas, or cutting and crushing.
- Chemical changes involve chemical reactions that alter the molecular structure and create new substances, like rusting, burning, or digestion.
- The rock cycle and digestion process involve both physical changes (breaking rocks or movement through the digestive system) and chemical changes (chemical weathering or digestion of food).
Compounds & Elements
This document defines key chemistry concepts including matter, mixtures, pure substances, elements, and compounds. It states that matter is anything that has mass and takes up space. Mixtures are combinations of two or more substances that are not chemically combined, while pure substances are either elements or compounds. Elements are the simplest forms of matter that cannot be broken down further, while compounds are formed by two or more elements that are chemically bonded together. The document provides examples of each term and guidelines for identifying elements and compounds based on changes in mass during chemical reactions.
2.3 Notes
Chemical properties can only be observed when a substance changes into a different substance through chemical reactions. Common chemical properties include flammability, which is a substance's ability to burn, and reactivity, which is how readily it combines with other substances. Chemical changes can be identified by a change in color, production of a gas, or formation of a precipitate, and result in a change to the composition of the substance.
Physical and chemical changes
Changes in matter are classified into physical and chemical changes.Physical Changes are those in which the identifying properties of substances remain unchanged. Chemical Changes are those in which new substances with new properties are formed.
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Unit b matter and chemical change notes(physical & chemical changes)
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The butterfly life cycle is most similar to a chemical change because during the life cycle the organism fundamentally changes from one type of being (egg, larva, pupa) into another distinct type of being (adult butterfly). This represents a change in identity or substance, which is characteristic of a chemical change.
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This document discusses the differences between physical and chemical properties and changes in matter. It states that all matter has two types of properties - physical and chemical. Physical properties can be observed without changing the substance, such as mass, state, and texture. Chemical properties can only be observed by changing the substance, like its ability to burn or react. A physical change alters the substance's form or shape but not its identity, while a chemical change creates a new substance through breaking or forming of bonds. Evidence of physical changes includes alterations in size or phase, and of chemical changes includes color or odor changes.
Types of chemical reactions
A physical change alters an object's physical properties like shape, size, or state but does not change its chemical composition. A chemical change produces new substances through the breaking and forming of chemical bonds. Evidence of a chemical change includes changes in odor, color, temperature, or formation of gases. There are four main types of chemical reactions: synthesis, decomposition, single displacement, and double displacement.
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This document discusses physical and chemical changes. It defines physical changes as changes that do not alter the chemical composition of a substance and are typically reversible, such as freezing or dissolving. Chemical changes alter the chemical composition by producing new substances, are not easily reversible, and result in changes like formation of a gas or precipitate, changes in color or mass. Examples of each type of change are provided along with signs that indicate whether a change is physical or chemical. Common chemical reactions like synthesis, decomposition, precipitation, and acid-base neutralization are also outlined.
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This document discusses physical and chemical changes. Physical changes alter a substance's physical properties or shape but do not change its chemical composition, giving examples like melting, freezing, and breaking. Chemical changes create new substances through synthesis or decomposition reactions, such as burning or rusting. The key difference is that physical changes do not alter a substance's chemical makeup while chemical changes produce different chemical substances.
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This document discusses observing and describing chemical changes. It defines chemical and physical properties and changes. A chemical change results in a new substance, while a physical change only changes the appearance or form of a substance. Chemical changes involve reactants changing into products and can be represented by chemical equations. They involve breaking and forming bonds. Evidence of a chemical change includes new properties, energy changes, and conservation of mass, with the same number and types of atoms in the reactants and products. A system can be open or closed to matter flow during chemical reactions.
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1. Physical changes alter a substance's physical properties like state of matter, shape, or size without changing its chemical composition. They include phase changes like melting, freezing, evaporation, and condensation caused by adding or removing energy.
2. Chemical changes create new substances with different chemical compositions through chemical reactions. Signs include fizzing, color changes, heat/light production, odor, and precipitate formation. Examples are burning, cooking, rusting, and combining baking soda and vinegar.
3. Phase changes between solids, liquids, and gases that do not alter chemical makeup, like melting ice or evaporating water, are physical not chemical changes.
Changes of matter
A physical change alters a substance's form or appearance but not its chemical composition, such as water freezing to ice. A chemical change creates new substances through molecular rearrangement, like iron rusting due to oxidation. Chemical changes can be identified by changes in properties such as density, melting point, or reactions producing gas.
PHYSICAL AND CHEMICAL CHANGE
This document discusses the differences between physical and chemical changes. Physical changes can be easily undone and do not change the substance's composition, though the substance's state or the arrangement of its molecules may change. Chemical changes result in a new substance through molecular rearrangement and cannot be easily reversed. Examples of physical changes include breaking or cutting an object, while examples of chemical changes include burning wood or digesting food.
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A chemical change results in new substances forming with different properties, while a physical change alters a substance's properties but not its composition. Key indicators of a chemical change include changes in temperature, odor, color, gas or precipitate formation. A physical change may alter a substance's state, shape, or texture without an underlying compositional alteration. The document provides examples of chemical changes like burning or rusting and physical changes like melting ice or changing a metal's color.
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This document discusses various topics related to chemical reactions including: types of chemical reactions like combination, decomposition, displacement, and redox reactions; oxidation and reduction; corrosion; and rancidity. It provides examples and definitions for key concepts. Balancing chemical equations and identifying oxidizing/reducing agents and substances that are oxidized/reduced in reactions are also covered.
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This document discusses physical and chemical changes. It provides examples of each type of change and outlines their key differences. A physical change alters a substance's physical properties but does not form new substances, is usually reversible, and involves little energy change. A chemical change produces new substances with different chemical compositions through irreversible reactions, and significant energy is absorbed or released. Examples of physical changes include melting, freezing, and cutting; chemical changes include burning fuels and the reaction of vinegar with baking soda.
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A proprietary approach developed by bringing together the best of learning theories from Psychology, design principles from the world of visualization, and pedagogical methods from over a decade of training experience, that enables you to: Learn better, faster!
Summary Of transcription and Translation.pdf
Hello Everyone Here We are Sharing You with The process of protien Synthesis in very short points you will be Able to understand It Very well
Quality assurance B.pharm 6th semester BP606T UNIT 5
Warehousing
Good warehousing practices
Material management
MICROBIAL INTERACTION PPT/ MICROBIAL INTERACTION AND THEIR TYPES // PLANT MIC...
MICROBIAL INTERACTION PPT/ MICROBIAL INTERACTION AND THEIR TYPES // PLANT MIC...ABHISHEK SONI NIMT INSTITUTE OF MEDICAL AND PARAMEDCIAL SCIENCES , GOVT PG COLLEGE NOIDA
Microbial interaction
Microorganisms interacts with each other and can be physically associated with another organisms in a variety of ways.
One organism can be located on the surface of another organism as an ectobiont or located within another organism as endobiont.
Microbial interaction may be positive such as mutualism, proto-cooperation, commensalism or may be negative such as parasitism, predation or competition
Types of microbial interaction
Positive interaction: mutualism, proto-cooperation, commensalism
Negative interaction: Ammensalism (antagonism), parasitism, predation, competition
I. Mutualism:
It is defined as the relationship in which each organism in interaction gets benefits from association. It is an obligatory relationship in which mutualist and host are metabolically dependent on each other.
Mutualistic relationship is very specific where one member of association cannot be replaced by another species.
Mutualism require close physical contact between interacting organisms.
Relationship of mutualism allows organisms to exist in habitat that could not occupied by either species alone.
Mutualistic relationship between organisms allows them to act as a single organism.
Examples of mutualism:
i. Lichens:
Lichens are excellent example of mutualism.
They are the association of specific fungi and certain genus of algae. In lichen, fungal partner is called mycobiont and algal partner is called
II. Syntrophism:
It is an association in which the growth of one organism either depends on or improved by the substrate provided by another organism.
In syntrophism both organism in association gets benefits.
Compound A
Utilized by population 1
Compound B
Utilized by population 2
Compound C
utilized by both Population 1+2
Products
In this theoretical example of syntrophism, population 1 is able to utilize and metabolize compound A, forming compound B but cannot metabolize beyond compound B without co-operation of population 2. Population 2is unable to utilize compound A but it can metabolize compound B forming compound C. Then both population 1 and 2 are able to carry out metabolic reaction which leads to formation of end product that neither population could produce alone.
Examples of syntrophism:
i. Methanogenic ecosystem in sludge digester
Methane produced by methanogenic bacteria depends upon interspecies hydrogen transfer by other fermentative bacteria.
Anaerobic fermentative bacteria generate CO2 and H2 utilizing carbohydrates which is then utilized by methanogenic bacteria (Methanobacter) to produce methane.
ii. Lactobacillus arobinosus and Enterococcus faecalis:
In the minimal media, Lactobacillus arobinosus and Enterococcus faecalis are able to grow together but not alone.
The synergistic relationship between E. faecalis and L. arobinosus occurs in which E. faecalis require folic acid
Discovery of An Apparent Red, High-Velocity Type Ia Supernova at 𝐳 = 2.9 wi...
We present the JWST discovery of SN 2023adsy, a transient object located in a host galaxy JADES-GS
+
53.13485
−
27.82088
with a host spectroscopic redshift of
2.903
±
0.007
. The transient was identified in deep James Webb Space Telescope (JWST)/NIRCam imaging from the JWST Advanced Deep Extragalactic Survey (JADES) program. Photometric and spectroscopic followup with NIRCam and NIRSpec, respectively, confirm the redshift and yield UV-NIR light-curve, NIR color, and spectroscopic information all consistent with a Type Ia classification. Despite its classification as a likely SN Ia, SN 2023adsy is both fairly red (
�
(
�
−
�
)
∼
0.9
) despite a host galaxy with low-extinction and has a high Ca II velocity (
19
,
000
±
2
,
000
km/s) compared to the general population of SNe Ia. While these characteristics are consistent with some Ca-rich SNe Ia, particularly SN 2016hnk, SN 2023adsy is intrinsically brighter than the low-
�
Ca-rich population. Although such an object is too red for any low-
�
cosmological sample, we apply a fiducial standardization approach to SN 2023adsy and find that the SN 2023adsy luminosity distance measurement is in excellent agreement (
≲
1
�
) with
Λ
CDM. Therefore unlike low-
�
Ca-rich SNe Ia, SN 2023adsy is standardizable and gives no indication that SN Ia standardized luminosities change significantly with redshift. A larger sample of distant SNe Ia is required to determine if SN Ia population characteristics at high-
�
truly diverge from their low-
�
counterparts, and to confirm that standardized luminosities nevertheless remain constant with redshift.
Injection: Risks and challenges - Injection of CO2 into geological rock forma...
Presentation by Dr. Florian Krob, Workshop "Risks of CO2 storage - How can they be addressed and reduced?", 22.4.2024
SDSS1335+0728: The awakening of a ∼ 106M⊙ black hole⋆
Context. The early-type galaxy SDSS J133519.91+072807.4 (hereafter SDSS1335+0728), which had exhibited no prior optical variations during the preceding two decades, began showing significant nuclear variability in the Zwicky Transient Facility (ZTF) alert stream from December 2019 (as ZTF19acnskyy). This variability behaviour, coupled with the host-galaxy properties, suggests that SDSS1335+0728 hosts a ∼ 106M⊙ black hole (BH) that is currently in the process of ‘turning on’. Aims. We present a multi-wavelength photometric analysis and spectroscopic follow-up performed with the aim of better understanding the origin of the nuclear variations detected in SDSS1335+0728. Methods. We used archival photometry (from WISE, 2MASS, SDSS, GALEX, eROSITA) and spectroscopic data (from SDSS and LAMOST) to study the state of SDSS1335+0728 prior to December 2019, and new observations from Swift, SOAR/Goodman, VLT/X-shooter, and Keck/LRIS taken after its turn-on to characterise its current state. We analysed the variability of SDSS1335+0728 in the X-ray/UV/optical/mid-infrared range, modelled its spectral energy distribution prior to and after December 2019, and studied the evolution of its UV/optical spectra. Results. From our multi-wavelength photometric analysis, we find that: (a) since 2021, the UV flux (from Swift/UVOT observations) is four times brighter than the flux reported by GALEX in 2004; (b) since June 2022, the mid-infrared flux has risen more than two times, and the W1−W2 WISE colour has become redder; and (c) since February 2024, the source has begun showing X-ray emission. From our spectroscopic follow-up, we see that (i) the narrow emission line ratios are now consistent with a more energetic ionising continuum; (ii) broad emission lines are not detected; and (iii) the [OIII] line increased its flux ∼ 3.6 years after the first ZTF alert, which implies a relatively compact narrow-line-emitting region. Conclusions. We conclude that the variations observed in SDSS1335+0728 could be either explained by a ∼ 106M⊙ AGN that is just turning on or by an exotic tidal disruption event (TDE). If the former is true, SDSS1335+0728 is one of the strongest cases of an AGNobserved in the process of activating. If the latter were found to be the case, it would correspond to the longest and faintest TDE ever observed (or another class of still unknown nuclear transient). Future observations of SDSS1335+0728 are crucial to further understand its behaviour. Key words. galaxies: active– accretion, accretion discs– galaxies: individual: SDSS J133519.91+072807.4
Sustainable Land Management - Climate Smart Agriculture
Sustainable Land Management - Climate Smart AgricultureInternational Food Policy Research Institute- South Asia Office
PPT on Sustainable Land Management presented at the three-day 'Training and Validation Workshop on Modules of Climate Smart Agriculture (CSA) Technologies in South Asia' workshop on April 22, 2024.
11.1 Role of physical biological in deterioration of grains.pdf
Storagedeteriorationisanyformoflossinquantityandqualityofbio-materials.
Themajorcausesofdeteriorationinstorage
•Physical
•Biological
•Mechanical
•Chemical
Storageonlypreservesquality.Itneverimprovesquality.
Itisadvisabletostartstoragewithqualityfoodproduct.Productwithinitialpoorqualityquicklydepreciates
HUMAN EYE By-R.M Class 10 phy best digital notes.pdf
Class 10 human eye notes physics
Handwritten best quality
Evidence of Jet Activity from the Secondary Black Hole in the OJ 287 Binary S...
Wereport the study of a huge optical intraday flare on 2021 November 12 at 2 a.m. UT in the blazar OJ287. In the binary black hole model, it is associated with an impact of the secondary black hole on the accretion disk of the primary. Our multifrequency observing campaign was set up to search for such a signature of the impact based on a prediction made 8 yr earlier. The first I-band results of the flare have already been reported by Kishore et al. (2024). Here we combine these data with our monitoring in the R-band. There is a big change in the R–I spectral index by 1.0 ±0.1 between the normal background and the flare, suggesting a new component of radiation. The polarization variation during the rise of the flare suggests the same. The limits on the source size place it most reasonably in the jet of the secondary BH. We then ask why we have not seen this phenomenon before. We show that OJ287 was never before observed with sufficient sensitivity on the night when the flare should have happened according to the binary model. We also study the probability that this flare is just an oversized example of intraday variability using the Krakow data set of intense monitoring between 2015 and 2023. We find that the occurrence of a flare of this size and rapidity is unlikely. In machine-readable Tables 1 and 2, we give the full orbit-linked historical light curve of OJ287 as well as the dense monitoring sample of Krakow.
Male reproduction physiology by Suyash Garg .pptx
Physiology of Male reproduction.
Video mentioned at page no. 23 as summary for better understanding
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Clinical periodontology and implant dentistry 2003.pdf
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Quality assurance B.pharm 6th semester BP606T UNIT 5
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Injection: Risks and challenges - Injection of CO2 into geological rock forma...
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Sustainable Land Management - Climate Smart Agriculture
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Juaristi, Jon. - El canon espanol. El legado de la cultura española a la civi...
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HUMAN EYE By-R.M Class 10 phy best digital notes.pdf
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Evidence of Jet Activity from the Secondary Black Hole in the OJ 287 Binary S...
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Chemical and physical changes
- 1. Chemical and physical changes
- 2. Physical Change • A Physical change is a change in a substance that does not change what the substance is.
- 3. Physical Change - examples • Examples of physical change include: – Change in shape – Change in size – Change in phase • Melting (solid to liquid) • Boiling (liquid to gas) • Evaporation (liquid to gas) • Condensation (gas to liquid) • Freezing (liquid to solid) • Sublimation (solid to gas) • Deposition (gas to solid)
- 4. Physical Change • Physical changes might be caused by: – Grinding – Cutting – Crushing – Bending – Breaking – Heating/cooling • (change in phase) – squishing
- 5. Physical Change • Evidence that a physical change has occurred might include: – Change in shape – Change in form – Change in size – Change in phase (This is always a physical change!) – Physical changes are usually reversible
- 6. Physical change • What could you do to these items to cause a physical change to occur?
- 7. Chemical change • A chemical change is a change in which a substance is changed into a different substance. (You’ve changed what it is.)
- 8. Chemical change • Examples of chemical changes include: – Burning – Rusting – Tarnishing – Decomposing – Polymerization
- 9. Chemical change • Chemical changes occur when a chemical reaction causes bonds between atoms to break or to form.
- 10. Chemical change – Chemical reactions • There are 5 types of chemical reactions that cause chemical changes to occur.
- 11. Chemical change – Chemical reactions • 1- Composition reactions – Two things come together to form something new – A + B = AB – 2H2 + O2 2H2O
- 12. Chemical change – Chemical reactions • 2- Decomposition reactions – 1 thing breaks apart to form 2 or more things. – AB = A + B – 2H2O 2H2 + O2
- 13. Chemical change – Chemical reactions • 3- Single replacement reactions – One atom replaces another atom – A + BC = AC + B or A + BC = AB + C – Mg + 2HCl H2 + MgCl2
- 14. Chemical change – Chemical reactions • Double replacement reactions – Two chemicals switch places – AX + BY = AY + BX – 2KI + Pb(NO3)2 PbI2 + 2KNO3
- 15. Chemical change – Chemical reactions • Combustion reaction – A substance combines with oxygen and releases energy. – C3H8 (propane) + 5O2 3CO2 + 4H2O
- 16. Chemical Change: Evidence • Evidence that a chemical change has occurred might include: – A color change – An odor change – Formation of a precipitate (you mix two liquids and make a solid) – Gas is formed (bubbles) – Changes in physical properties.
- 17. Physical and Chemical change • During a chemical change energy can be released in the form of: – Heat – Light
- 18. Chemical change – Chemical reactions • When a chemical change occurs, energy is either released or absorbed.
- 19. Physical and Chemical change - heat • A chemical reaction that releases energy in the form of heat is called exothermic. – Heat comes OUT • Exo = out • Thermic = heat – It will feel HOT.
- 20. Physical and Chemical change - heat • A chemical reaction that absorbs energy in the form of heat is called endothermic. – Heat goes IN • Endo = in • Thermic = heat – It will feel COLD
- 21. Quiz time! • Which life cycle is most similar to a chemical change? • Why? Grasshopper = Eggnymphadult Butterfly = egglarvapupaadult
- 22. Quiz time! • What type of reaction is most likely occurring here? • How do you know?
- 23. Quiz time! • What type of reaction is most likely occurring here? • How do you know?
- 24. Quiz time! • What type of reaction is most likely occurring here? • How do you know?