Photosynthesis part 3
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Photosynthesis is a key part of the carbon cycle. It involves producers converting inorganic carbon dioxide into organic compounds like glucose. Primary consumers obtain these organic compounds by eating producers, and secondary consumers obtain carbon by eating primary consumers. Cellular respiration by all organisms returns carbon dioxide to the atmosphere. Humans have disrupted this natural cycle by extracting and burning fossil fuels, releasing carbon that has been locked away for thousands of years back into the atmosphere as carbon dioxide, contributing to increased global warming.
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Photosynthesis global
1) Photosynthesis is a key part of the natural carbon cycle, in which carbon moves between organic and inorganic forms as producers convert carbon dioxide into organic compounds and consumers and decomposers release it back through respiration.
2) Humans have disrupted this cycle by extracting and burning fossil fuels, releasing carbon that has been locked away for millions of years back into the atmosphere as carbon dioxide.
3) The increasing levels of carbon dioxide in the atmosphere are enhancing the natural greenhouse effect and leading to increased global warming.
Photosynthesis part 3
There are two main processes in the natural carbon cycle: photosynthesis and cellular respiration. Photosynthesis involves producers converting inorganic carbon like CO2 into organic compounds like glucose. Cellular respiration returns carbon back to the atmosphere as CO2. Some CO2 dissolves in the ocean and some is used by marine organisms through photosynthesis. When these organisms die, their shells and coral fall to the ocean floor forming carbonate sediments over long periods. These sediments may later emerge as dry land or mountains made of limestone.
The Carbon Cycle
The carbon cycle describes how carbon is exchanged between the biosphere, geosphere, hydrosphere and atmosphere of the Earth. It involves the exchange of carbon in its various forms - as carbon dioxide (CO2), methane (CH4), and carbon within living things. The key points are:
- Carbon dioxide is absorbed by plants through photosynthesis and becomes part of biomass, while animals get carbon by eating plants or other animals. Decomposers return carbon to the atmosphere as carbon dioxide.
- The carbon cycle can be classified as short-term (within years) or long-term (over thousands of years).
- Human activities like burning fossil fuels and deforestation are disrupting
Pakistan and global warming A Lecture by Allah Dad Khan Visiting Professor A...
This document discusses global warming and its impacts on Pakistan. It first provides background on greenhouse gases and how they contribute to global warming by trapping heat in the atmosphere. It then discusses how Pakistan has experienced impacts from climate change, including more severe monsoon rains and flooding, glacial melting that threatens water supply, droughts, health impacts from extreme weather, loss of marine life, and rise in sea level threatening coastal areas. The document concludes that Pakistan is highly vulnerable to climate change impacts according to the IPCC and faces serious risks from flooding and impacts to agriculture.
Oxygen co emission
While rainforests contribute little to atmospheric oxygen levels, deforestation releases large amounts of carbon dioxide into the air by burning forest plants, contributing to global warming. Scientists state that tropical deforestation releases 1.5 billion tons of carbon each year. Forests also help stabilize the biosphere by extracting carbon dioxide and pollutants from the air. Burning fossil fuels releases carbon dioxide trapped underground for millions of years too quickly for plants and trees to absorb, increasing the carbon dioxide levels in the atmosphere and causing global warming and unpredictable climate changes. Reducing fossil fuel use can help mitigate extreme weather risks.
Global warming
Global warming is caused by the greenhouse effect, where gases like carbon dioxide, methane, and nitrous oxide trap heat in the atmosphere. The levels of these greenhouse gases have increased since the industrial revolution due to human activities like burning fossil fuels and deforestation. This has led to rising global temperatures and sea levels, and more extreme weather. While some effects of climate change can be mitigated, human population growth and consumption patterns are ultimately unsustainable and could lead to the decline or collapse of human societies if environmental resources are overexploited, as seen in historical examples like Easter Island.
greenhouse effect
The document defines the greenhouse effect as a process where greenhouse gases in the atmosphere absorb and re-radiate thermal radiation from the surface, trapping heat. It then explains that greenhouse gases like carbon dioxide, methane, and nitrous oxide absorb infrared radiation emitted from the Earth's surface and radiate it in all directions, warming the lower atmosphere and surface. The main sources of greenhouse gases are the burning of fossil fuels, deforestation, livestock, CFC refrigerants, and agriculture such as fertilizer use.
Presentació
The document discusses the greenhouse effect and its impacts. It begins by explaining that the natural greenhouse effect warms the Earth but industrial activity since the 19th century has increased greenhouse gases like CO2, methane, and nitrous oxide. This is causing global warming that could melt ice and raise sea levels. It then outlines how the major fossil fuels - coal, oil, and natural gas - are contributing to greenhouse gas emissions and will continue to be relied on for energy for the next century. The document concludes by mentioning other air pollutants and recommending reducing waste by recycling, reusing, and reducing consumption to help address these issues.
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Photosynthesis global
1) Photosynthesis is a key part of the natural carbon cycle, in which carbon moves between organic and inorganic forms as producers convert carbon dioxide into organic compounds and consumers and decomposers release it back through respiration.
2) Humans have disrupted this cycle by extracting and burning fossil fuels, releasing carbon that has been locked away for millions of years back into the atmosphere as carbon dioxide.
3) The increasing levels of carbon dioxide in the atmosphere are enhancing the natural greenhouse effect and leading to increased global warming.
Photosynthesis part 3
There are two main processes in the natural carbon cycle: photosynthesis and cellular respiration. Photosynthesis involves producers converting inorganic carbon like CO2 into organic compounds like glucose. Cellular respiration returns carbon back to the atmosphere as CO2. Some CO2 dissolves in the ocean and some is used by marine organisms through photosynthesis. When these organisms die, their shells and coral fall to the ocean floor forming carbonate sediments over long periods. These sediments may later emerge as dry land or mountains made of limestone.
The Carbon Cycle
The carbon cycle describes how carbon is exchanged between the biosphere, geosphere, hydrosphere and atmosphere of the Earth. It involves the exchange of carbon in its various forms - as carbon dioxide (CO2), methane (CH4), and carbon within living things. The key points are:
- Carbon dioxide is absorbed by plants through photosynthesis and becomes part of biomass, while animals get carbon by eating plants or other animals. Decomposers return carbon to the atmosphere as carbon dioxide.
- The carbon cycle can be classified as short-term (within years) or long-term (over thousands of years).
- Human activities like burning fossil fuels and deforestation are disrupting
Pakistan and global warming A Lecture by Allah Dad Khan Visiting Professor A...
This document discusses global warming and its impacts on Pakistan. It first provides background on greenhouse gases and how they contribute to global warming by trapping heat in the atmosphere. It then discusses how Pakistan has experienced impacts from climate change, including more severe monsoon rains and flooding, glacial melting that threatens water supply, droughts, health impacts from extreme weather, loss of marine life, and rise in sea level threatening coastal areas. The document concludes that Pakistan is highly vulnerable to climate change impacts according to the IPCC and faces serious risks from flooding and impacts to agriculture.
Oxygen co emission
While rainforests contribute little to atmospheric oxygen levels, deforestation releases large amounts of carbon dioxide into the air by burning forest plants, contributing to global warming. Scientists state that tropical deforestation releases 1.5 billion tons of carbon each year. Forests also help stabilize the biosphere by extracting carbon dioxide and pollutants from the air. Burning fossil fuels releases carbon dioxide trapped underground for millions of years too quickly for plants and trees to absorb, increasing the carbon dioxide levels in the atmosphere and causing global warming and unpredictable climate changes. Reducing fossil fuel use can help mitigate extreme weather risks.
Global warming
Global warming is caused by the greenhouse effect, where gases like carbon dioxide, methane, and nitrous oxide trap heat in the atmosphere. The levels of these greenhouse gases have increased since the industrial revolution due to human activities like burning fossil fuels and deforestation. This has led to rising global temperatures and sea levels, and more extreme weather. While some effects of climate change can be mitigated, human population growth and consumption patterns are ultimately unsustainable and could lead to the decline or collapse of human societies if environmental resources are overexploited, as seen in historical examples like Easter Island.
greenhouse effect
The document defines the greenhouse effect as a process where greenhouse gases in the atmosphere absorb and re-radiate thermal radiation from the surface, trapping heat. It then explains that greenhouse gases like carbon dioxide, methane, and nitrous oxide absorb infrared radiation emitted from the Earth's surface and radiate it in all directions, warming the lower atmosphere and surface. The main sources of greenhouse gases are the burning of fossil fuels, deforestation, livestock, CFC refrigerants, and agriculture such as fertilizer use.
Presentació
The document discusses the greenhouse effect and its impacts. It begins by explaining that the natural greenhouse effect warms the Earth but industrial activity since the 19th century has increased greenhouse gases like CO2, methane, and nitrous oxide. This is causing global warming that could melt ice and raise sea levels. It then outlines how the major fossil fuels - coal, oil, and natural gas - are contributing to greenhouse gas emissions and will continue to be relied on for energy for the next century. The document concludes by mentioning other air pollutants and recommending reducing waste by recycling, reusing, and reducing consumption to help address these issues.
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Carbon is essential for life and is present in many biological molecules like proteins, nucleic acids, lipids, and carbohydrates. It cycles between the atmosphere, ocean, living things, and geological reservoirs as part of the global carbon cycle. The carbon cycle involves photosynthesis fixing carbon from the air or water into organic compounds, respiration and decomposition releasing it back, and geological processes like fossil fuel formation, limestone creation and erosion, and volcanic activity moving it between air, water, and rocks over long time periods.
green house gases
The document discusses the greenhouse effect and greenhouse gases. It explains that certain gases in the atmosphere trap heat from the sun, causing the greenhouse effect. It then describes the major greenhouse gases like carbon dioxide, methane, nitrous oxide, and chlorofluorocarbons. The document outlines the various human activities that contribute to increased levels of these gases in the atmosphere, such as burning fossil fuels, deforestation, agriculture, and industrial processes. It concludes by discussing some of the potential consequences of rising global temperatures like sea level rise and disruption of ecosystems.
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The document discusses carbon sequestration in soils and its importance. It notes that carbon dioxide can be stored in soils through certain agricultural practices, but that rising temperatures threaten to release stored carbon. Adopting practices that build up carbon in soils over 40-50 years could help mitigate climate change. The document outlines how carbon is essential to soil health, plant growth, and all life, and explains the potential of different agricultural practices to sequester carbon in kilograms per hectare per year.
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The carbon cycle plays an important role in regulating carbon levels on Earth. As humans cut down more trees and burn fossil fuels, carbon dioxide levels increase in the atmosphere, exacerbating global warming. The carbon cycle involves carbon moving from the atmosphere to plants through photosynthesis, then to animals that eat plants, and eventually back to the atmosphere through respiration and decomposition. Maintaining the balance of the carbon cycle is critical for sustaining the food chain and regulating carbon levels in oceans, forests, and the atmosphere.
The ice age
During the last ice age, increasing levels of carbon dioxide and other greenhouse gases in the atmosphere warmed the global climate and caused the melting of glacial ice sheets. As the ice melted, it led animals to lose their habitats. Evidence from air pockets in Antarctic ice cores shows that carbon dioxide levels during the last ice age were much higher than before industrialization raised current CO2 concentrations.
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Fossil fuels
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The document discusses the atmosphere and global warming. It outlines the key greenhouse gases like carbon dioxide, methane, and nitrous oxide that trap heat and are increasing due to human activities like burning fossil fuels. This greenhouse effect is causing global temperatures to rise and is affecting seasons, glaciers, sea levels, and plant and animal life. While natural factors influence the climate, human activities are the main driver of current global warming trends according to evidence like retreating glaciers and earlier seasonal changes. Individual actions like using energy efficient light bulbs and reducing packaging can help address the problem.
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Global warming has been caused by human activities since the industrial revolution. People have been burning fossil fuels, cutting down forests, and releasing harmful chemicals into the atmosphere. This has led to increasing global temperatures, rising sea levels, and more extreme weather events. While we cannot stop global warming at this point, individual actions like reducing waste, reusing materials, and recycling can help slow the process and allow the planet to recover over hundreds of years.
Fossil fuel
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Carbon has an important role in environment so its important to know about the carbon cycle.Here is the brief description of carbon cycle.
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Carbon cycles between the atmosphere, organisms, oceans, and lithosphere. Plants absorb carbon dioxide from the air through photosynthesis, and animals obtain carbon by eating plants or other animals. When organisms die, decomposers release carbon back into the atmosphere or it becomes trapped underground in fossil fuels and other deposits. Human activities like burning fossil fuels have increased the amount of carbon dioxide in the atmosphere, contributing to global warming.
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Carbon cycles between the atmosphere, organisms, oceans, and lithosphere. Plants absorb carbon dioxide from the air through photosynthesis, and animals obtain carbon by eating plants or other animals. When organisms die, decomposers release carbon back into the atmosphere or it becomes trapped in fossil fuels and sediments. Human activities like burning fossil fuels have increased the amount of carbon dioxide in the atmosphere, contributing to global warming.
Carbon cycle
Carbon is an essential element that cycles between the atmosphere, ocean, organisms, and geologic reservoirs as part of the carbon cycle. Photosynthesis incorporates carbon from the air and water into organic compounds, while respiration and decomposition release it back. Fossil fuels like coal and oil were formed from ancient plant and algae remains over millions of years. Burning fossil fuels returns carbon to the air, and limestone erosion also adds carbon back to the cycle through weathering. The carbon cycle continuously moves carbon between the biosphere and geosphere.
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The carbon cycle describes the process in which carbon atoms continually travel from the atmosphere to the Earth and then back into the atmosphere.
Carbon cycle
The document discusses the carbon cycle, which involves carbon continually moving through living organisms, oceans, atmosphere, and rocks. There are four main subcycles - the rock subcycle over millions of years, ocean subcycle over hundreds of years, biological subcycle over days to years, and fossil fuel subcycle over millions of years being released in recent decades. Carbon is essential for life and plays a key role in climate as a greenhouse gas.
Carbon Cycle
The document summarizes the carbon cycle, which is the movement of carbon between different reservoirs on Earth and in its atmosphere. Carbon continually cycles between living organisms, oceans, atmosphere, and rocks through various processes over timescales ranging from years to millions of years. Key parts of the cycle include photosynthesis fixing carbon from the atmosphere into organisms, respiration and decomposition releasing carbon back to the air, and geological processes like weathering sequestering carbon in rocks over millions of years.
Similar to Photosynthesis part 3 (20)
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Syllabus
This document is a syllabus for Cambridge International A & AS Level Biology. It outlines the aims, assessment objectives, content, and assessment details of the course. The aims are to provide students with an educational experience in biology, develop relevant skills and attitudes, and stimulate interest in biology. The course is assessed through multiple choice, structured, and practical exam papers that test knowledge, handling information, and experimental skills. The syllabus content is divided into core topics and applications.
Extra credit 2011 2012
This document outlines two extra credit opportunities for Ms. Donohue's class: Classroom Supply Extra Credit and Novel Extra Credit. For Classroom Supply Extra Credit, students can receive points for donating classroom supplies like copy paper, dry erase markers, or latex gloves, with a maximum of 25 points. For Novel Extra Credit, students can receive 20 points for donating their copy of one of the specified class novels.
Cambridge biology syllabus
This document is a syllabus for Cambridge International A & AS Level Biology. It outlines the aims, objectives, content, and assessment of the course. The aims are to provide students with an understanding of biology, scientific skills, and interests in further study. Students can take AS exams after 1 year or complete the full A Level after 2 years. Assessment includes multiple choice, structured questions, practical exams, and essays. The content covers core biological principles and applications.
Hominid evolution part
Hominids first appeared between 6-7 million years ago in Africa and have evolved several times as evidenced by fossil records. Key adaptations throughout hominid evolution include bipedal locomotion, increasing brain size, facial structure changes, decreasing jaw and tooth size, opposable thumbs, and tool usage. The earliest known hominid genus is Australopithecus, followed by species like Homo habilis, Homo erectus, Homo sapiens, and Homo neanderthalensis, with modern humans emerging in the last 10,000 years.
Nonrenewable energy
The document discusses the benefits of exercise for mental health. Regular physical activity can help reduce anxiety and depression and improve mood and cognitive functioning. Exercise causes chemical changes in the brain that may help boost feelings of calmness, happiness and focus.
Pesticides and biodiversity
The document discusses several topics related to forest and land management:
1. It defines conservation biology, uneven-aged management, even-aged management, intrinsic value, instrumental value, old-growth forest, second-growth forest, tree plantations, deforestation, and ecological restoration.
2. It notes that old-growth forests are found primarily in western US, Russia, Brazil, Canada, and Indonesia. Most of the world's forests are secondary growth. Clear-cutting increases soil erosion and sediment pollution.
3. Large reserves support more species diversity than small reserves. Population size determines environmental impacts, usually negative. Urbanization is a main cause of arable land and biodiversity loss.
Water presentation gloria wilfredo
Water is a vital resource that sustains life. Freshwater sources include groundwater, which infiltrates underground, and surface water. Groundwater depletion can occur when withdrawals exceed recharge, causing water tables to fall and land to subside. Increasing supplies involves desalination or reverse osmosis. Water pollution reduces water quality and harms organisms. Major pollutants include pathogens, nutrients, chemicals, sediments and heat. Pollution can be from point sources like factories or nonpoint sources like runoff. Treating sewage reduces pollution levels. Large-scale water diversions for uses like irrigation and cities can deplete rivers and harm ecosystems.
Jasmine aquatic diversity
The document provides information about aquatic biodiversity including definitions of key terms like plankton, nekton, benthos, and decomposers. It also discusses aquatic ecosystems like coastal zones, wetlands, and intertidal zones. Multiple choice questions test comprehension of topics like ocean acidification, plankton types, eutrophic lakes, and aquaculture. A free response question asks why aquatic plants tend to be smaller while some marine mammals are extremely large.
Human health alfredo and dalyn
The document summarizes different types of waste (hazardous, solid), waste disposal methods (open dumps, sanitary landfills, incineration), types of recycling (primary, secondary, composting), types of radioactive waste (high level, low level), types of environmental hazards (biological, chemical, physical, cultural, lifestyle), specific biological and chemical hazards, and cultural and lifestyle hazards. It also includes multiple choice questions about these topics.
Energy efficiency and renewable energy gabriel riley
Here are responses to the questions about hydroelectric power:
a) The series of energy transformations in a hydroelectric plant are:
1) Potential energy of water stored behind the dam is converted to kinetic energy as water flows through pipes/turbines.
2) The kinetic energy of flowing water is used to spin turbines.
3) The spinning turbines are connected to generators which convert the kinetic energy of the spinning turbines into electrical energy.
b) Once a hydroelectric dam is constructed, the source of fuel (falling water) is replenished by nature through the water cycle. As long as rainfall continues to fill reservoirs, the dams can generate electricity without incurring significant ongoing fuel costs.
c) One species
Amamda and robert air pollution and ozone ppt
Here are multiple choice samples from past AP Environmental Science exams:
1998 Exam:
1. Which of the following best describes the greenhouse effect?
A) Gases in the atmosphere allow visible light to pass through but absorb infrared radiation, warming the lower atmosphere.
B) Gases in the atmosphere absorb all wavelengths of electromagnetic radiation, trapping heat near the surface of the Earth.
C) Gases in the atmosphere reflect most visible light and infrared radiation back into space, preventing warming of the lower atmosphere.
D) Gases in the atmosphere allow most infrared radiation to pass through into space, preventing significant warming of the lower atmosphere.
E) Gases in the atmosphere absorb visible light but allow most infrared radiation to
Embryology and reproduction
1. Fertilization occurs when a sperm cell fuses with an egg cell to form a zygote. The zygote then undergoes cleavage and develops into a morula, blastula, and then a gastrula with three germ layers.
2. The embryo develops organs and tissues during the first trimester and is then referred to as a fetus. It continues to grow and develop throughout the second and third trimesters.
3. The male and female reproductive systems produce and transport gametes through various glands and structures. In females, eggs mature in the ovaries and travel through the fallopian tubes, while in males sperm mature in the testes and epididymis and
Evolution part 3
Hominids first appeared between 6-7 million years ago in Africa. They have evolved several times, as evidenced by fossil records. Key adaptations in hominid evolution included bipedal locomotion, larger brains and cranial capacities, changes in skull shape and jaw size, and opposable thumbs. Major hominid species included Homo habilis, Homo erectus, Homo sapiens, and Homo neanderthalensis. Homo sapiens are the only surviving hominid lineage.
Evolution part 2
Evolution is the process by which species change over time based on genetic variations and natural selection. Organisms must compete for limited resources and reproduce, so individuals with traits better suited to their environment are more likely to survive and pass on their genes. Evidence for evolution includes fossils that show how species have changed over millions of years, as well as anatomical and genetic similarities between organisms that indicate common ancestry. Darwin proposed that evolution occurs through natural selection, where individuals with advantageous traits are more likely to reproduce and leave more descendants.
Evolution part1
The document discusses the origins of life on Earth. It describes the early conditions on the primitive Earth that allowed for life to emerge, including the presence of liquid water, moderate temperatures, sunlight, and gases like carbon dioxide and methane in the atmosphere from volcanoes. Early life forms like bacteria emerged around 3.8 billion years ago. The document then discusses theories for how life began like spontaneous generation, the Miller-Urey experiment that produced amino acids from conditions simulating early Earth, and chemical evolution in underwater vents. Early life was in the form of prokaryotes for over a billion years before oxygen accumulated in the atmosphere around 2 billion years ago due to photosynthesis by cyanobacteria, allowing for more complex aerobic life
Evolution
The document discusses the origins of life on Earth and the evolution of species over time. It describes the early conditions on Earth that allowed life to form, including the presence of water, moderate temperatures, and various gases like carbon dioxide. It explains how early life forms like prokaryotes evolved and how oxygen began accumulating in the atmosphere due to photosynthetic bacteria. It also summarizes key ideas in Darwin's theory of evolution by natural selection, including inherited variation within populations, the struggle for existence, differential reproduction of offspring, and descent with modification over generations.
#2 villalobos brain, heart, reproductive syste and embryo development
The document discusses the nervous system and its major divisions - the central nervous system (CNS) and peripheral nervous system (PNS). The CNS includes the brain and spinal cord and controls the body's functions. The brain is made up of the cerebrum, cerebellum, and thalamus. The PNS includes nerves that connect the CNS to other parts of the body and is divided into sensory and motor divisions. The document also discusses the cardiovascular system including the heart, blood vessels, and blood circulation.
#1 donohue immune system, vaccines, and antibiotics
The document summarizes the immune system's three lines of defense against pathogens:
1. Barriers to infection like skin and mucous membranes that keep pathogens out of the body.
2. The inflammatory response that responds when pathogens enter, causing swelling and fever to fight the infection.
3. The immune response involving specialized white blood cells like macrophages, T cells, and B cells that mount a specific attack against the pathogen through antibodies and memory cells to prevent future infections.
Donohue dna practice questions
1. The document provides a review of biology concepts related to DNA, RNA, and protein synthesis. It contains 14 multiple choice questions about DNA replication, molecular clocks, sickle cell anemia treatment via gene therapy, DNA's role in controlling cells, transcription errors, the universal genetic code, DNA and RNA structures, transcription, DNA fingerprinting, and cloning human genes in bacteria.
2. Key concepts covered include that DNA replication involves DNA polymerase joining nucleotides to produce two new complementary DNA strands. Molecular clocks can be used to estimate how long ago species diverged from a common ancestor. Gene therapy for sickle cell anemia may involve inserting DNA that provides a blueprint for normal hemoglobin synthesis.
3. DNA in
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Energy efficiency and renewable energy gabriel riley
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#2 villalobos brain, heart, reproductive syste and embryo development
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Photosynthesis part 3
- 2. Carbon cycle Process by which carbon moves from organic to inorganic compounds and back Producers convert inorganic carbon (CO2) into organic carbon compounds (glucose) Primary Consumers obtain organic compounds by eating producers Secondary consumers obtain organic carbon by eating primary consumers Cellular Respiration by producers and consumers return CO2 to atmosphere
- 3. In the natural carbon cycle, there are two main processes which occur Photosynthesis Metabolism/Cellular Respiration
- 8. Carbon in Ocean and Sediments CO2 is slightly soluble Can be absorbed into water Some of the dissolved CO2 remains in the water, the warmer the water the less carbon dioxide remains in the water Some CO2 is used by algae and phytoplankton through the process of photosynthesis Coral and shelled marine organisms take up CO2 from the water and convert it into calcium carbonate When these organisms die pieces of shells/coral fall to ocean floor and make sediments The carbonate sediments are constantly being formed and redissolved in the bottom of the ocean Over long periods of time, the sediments may be raised up as dry land or into mountains This type of sedimentary rock is called limestone The carbonates can redissolve releasing carbon dioxide back to the air or water
- 11. Humans and the Carbon Cycle Combustion of any type of fossil fuel, which may include oil, coal, or natural gas Fossil Fuels formed thousands of years ago from plant or animal remains that were buried, compressed, and transformed into oil, coal, or natural gas This carbon is said to be "fixed" in place and is essentially locked out of the natural carbon cycle Humans intervene during by burning the fossil fuels During combustion in the presence of O2, CO2 and water molecules are released into the atmosphere
- 12. Photosynthesis and Global Climate CO2 makes up 0.03 percent of Earth’s atmosphere 300 parts per million Greenhouse Effect CO2 traps heat from sun in Earth’s atmosphere (otherwise it would escape into space) Not a bad thing Keeps world climate warm enough to sustain life Keeps Earth 10% warmer than it would be without CO2 Currently CO2 in atmosphere is rising 360 parts per million Burning fossil fuels Deforestation Natural Causes Photosynthesis Cellular respiration Decomposition Volcanic eruptions Ocean/limestone Global Warming Overall rise in Earth’s average temperature over a period of time