This document discusses physical and chemical changes. It defines irreversible changes as permanent changes that cannot be undone, involving chemical reactions that produce new materials. Reversible changes are changes that can be undone, involving only physical changes in state or form. Some examples of each are provided, like baking being irreversible while melting and freezing are reversible. Criteria for identifying chemical versus physical changes are outlined. The document concludes by introducing an activity to set up crystal geodes.
States of Matter: Solids, Liquids and Gases [Presentation]Greg Good
Presentation for junior high school science.
Topic: States of Matter: Solids, Liquids and Gases.
Comprehensive 33-slide presentation designed for self-directed learning, although equally useful as a classroom presentation.
Neatly laid out with clear and detailed explanations.
Covers:
• Properties of Solids, Liquids and Gases
• Particles in Solids, Liquids and Gases
• Heat Energy and State Changes
• Expansion and Contraction in Solids, Liquids and Gases
There are several digital and print worksheets available that accompany this presentation.
<a />www.GoodScienceWorksheets.com</a>
*Presentation is in Adobe Acrobat format. View in full screen mode (Ctrl L) and scroll through slides with arrows; Esc to get out of full screen view, navigate through slides using Page Thumbnails on left side of page, just like a PowerPoint presentation.
Presentation is on explaining concept of magnetism to kids of primary & secondary standards. The PPT is based on magnetism concepts covered in CBSE syllabus.
It helps kids to understand the concept in detail and if its coupled with few practical examples, it will be more fun.
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
States of Matter: Solids, Liquids and Gases [Presentation]Greg Good
Presentation for junior high school science.
Topic: States of Matter: Solids, Liquids and Gases.
Comprehensive 33-slide presentation designed for self-directed learning, although equally useful as a classroom presentation.
Neatly laid out with clear and detailed explanations.
Covers:
• Properties of Solids, Liquids and Gases
• Particles in Solids, Liquids and Gases
• Heat Energy and State Changes
• Expansion and Contraction in Solids, Liquids and Gases
There are several digital and print worksheets available that accompany this presentation.
<a />www.GoodScienceWorksheets.com</a>
*Presentation is in Adobe Acrobat format. View in full screen mode (Ctrl L) and scroll through slides with arrows; Esc to get out of full screen view, navigate through slides using Page Thumbnails on left side of page, just like a PowerPoint presentation.
Presentation is on explaining concept of magnetism to kids of primary & secondary standards. The PPT is based on magnetism concepts covered in CBSE syllabus.
It helps kids to understand the concept in detail and if its coupled with few practical examples, it will be more fun.
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
It shows the basic facts of catalyst along with its importance in industry along with its long last milestone,its characteristics & application in industry its reaction process and preparation of a solid catalyst.
Let us now try and define change for the purpose of science. We can define it as an act by which a thing forms or becomes different than its previous self. For instance, when ice melts, it changes into water. Therefore it turns its form from solid to liquid.
This is our first slide in slideshare account. i wish this will heip you for finding new ideas about physical and chemical change in systematic manner.
Project Name: Chemical and Physical changes
Chemical and Physical changes occur around us in day-to-day life, in our surroundings. Understanding them will help us better understand our world.
1. CHANGE
Any change in the scientific mosaic, i.e. a transition from one accepted theory to another or from one employed method to another. (Source: Scientific Change - Encyclopedia of Scientonomy) .
It can be of two types:
1. Chemical Change
2. Physical Change
CHEMICAL CHANGE:
Change in shape and size of a substance by forming a new substance with new properties.
The new substance formed cannot be turned back into its original state.
PHYSICAL CHANGE:
Change in shape and size of a substance that does not alter the properties of a substance.
A substance formed may be turned back into its original state.
Fact: The burning of the candle represents both physical and chemical change. As it melts physically it changes its states, while chemically CO2 (a gas) release during the burning of the candle.
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
Acetabularia Information For Class 9 .docxvaibhavrinwa19
Acetabularia acetabulum is a single-celled green alga that in its vegetative state is morphologically differentiated into a basal rhizoid and an axially elongated stalk, which bears whorls of branching hairs. The single diploid nucleus resides in the rhizoid.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
In this webinar you will learn how your organization can access TechSoup's wide variety of product discount and donation programs. From hardware to software, we'll give you a tour of the tools available to help your nonprofit with productivity, collaboration, financial management, donor tracking, security, and more.
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
3. Learning Intention Success Criteria
To analyse the observation prac results
To become familiar with Chemical and Physical Changes.
To become familiar with reversible and irreversible changes.
To set up Crystal Geodes
4. Irreversible Changes
What is an Irreversible change?
An Irreversible change is a permanent change that
cannot be undone.
Baking a cake
Frying an egg
Metal
rusting
Mixing cement
Burning paper
5. Irreversible Changes
• Are Chemical reactions.
• Start with a material and end up with one or
more new ones.
• The new material is completely different from the
original one.
• Sometimes the new material is useful and
sometimes it is not.
• Sometimes microorganisms such as bacteria and
yeast are used to create irreversible changes.
6. Reversible Changes
What is a reversible change?
A reversible change is a change that can be undone or
reversed.
When chocolate is warmed it
melts and turns into a liquid. It
can be turned back into a solid
again by cooling .
Orange juice can be frozen to form a
solid icy pole. When it melts it becomes
liquid again.
When candle wax is heated it
becomes liquid and as it cools it
becomes a solid again.
7. Boiling, evaporating and condensing (changing a gas into a
liquid)
If you could capture all the steam that is made when a kettle
boils, you could turn it back to water by cooling it.
Dissolving:- When salt is mixed with water it disappears because
it dissolves in the water to make salty water. But the salt can be
recovered from the salty water by boiling off the water.
8. Reversible Changes/Physical Changes
• Are called Physical changes
• A reversible change can change the way a
substance looks or feel (its physical
appearance) and then it can change back to
its original appearance again.
• The change may affect its size, shape or form
BUT -
• A new substance is not formed.
9. Irreversible Changes/Chemical Changes
• Are called Chemical changes
• Cannot be undone – eg a cake you bake
cannot be turned back into eggs, flour, sugar
or oil.
• Changes occur at a molecular level where
bonds are broken
AND
• New products are formed.
10. Chemical Change Checklist Physical Change Checklist
-------- A new substance was created
-------- The change cannot be reversed
-------- Gas bubble may be present
-------- Heat, light or smoke may be
released
-------- There may be a smell
--------- No new substance is created
--------- The changed can be reversed
--------- There is a change in state ie
freezing, melting, condensing
or evaporating
--------- There is a change in
appearance, texture, size,
shape or form.
11. R
e
v
i
e
w
Cooking an egg
Chemical
Shredding paper
Physical
A new substance is formed
Chemical
Microwave a bowl of soup
Physical
Water changes in the water cycle
Physical
Car crash makes a dent in the car
Physical
Acid rain wears away rock
Chemical
Mixing paint colours
Physical
Sunburn
Chemical
Fire Fly lights up
Chemical
Physical or Chemical
