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The Carbon CycleAll life is based on the element
carbon.
Carbon is in…..•all living things•the atmosphere•layers under ocean floor•fossil fuels (coal, oil, gas)
Every living thing contains carbon.
Carbon is always being cycled through the environment (from plants and animals to the
air and ground)
How does carbon move FROM the air INTO plants and animals?
Carbon dioxide (CO2)moves into plants by
photosynthesis
This is how all living things have carbon in them!
Carbon moves into animals by eating
plants or other animals
Photosynthesis: When plants take in carbon dioxide (CO2) and change it into oxygen (O2)
(CO2) => (O2)
Carbon moves from the air into plants by photosynthesis!
Plants take in carbon dioxide (CO2) through their leaves. They use CO2 to make their food. Then, plants give out oxygen (O2) in a process called photosynthesis.
Draw on 72
How does carbon dioxide move INTO the air FROM animals?
All living things breathe.
This is called respiration.
During respiration,
animals take in oxygen
(O2) and give out carbon
dioxide (CO2).
Draw on 72
Plants and animals trade carbon dioxide (CO2) and oxygen (O2)
back and forthAnimals (including
humans) breathe
out carbon dioxide
(CO2) through
respiration.
Plants take in the carbon dioxide(CO2) through photosynthesis and give out oxygen (O2)
Animals need oxygen to breathe. They breathe the O2 from the plants and release CO2.
GLOBAL WARMING: A result of TOO MUCH carbon in the air!
Too much carbon in the atmosphere is bad for the Earth. It traps in heat and causes global warming.
Burning fossil fuels produces carbon dioxide
How does TOO MUCH carbon move into the air?
Volcano eruptions
Burning Fossil Fuels (pollution)
Deforestation (cutting down trees)
Humans are
adding too much CO2 to the air!
How does TOO MUCH carbon move into the air? “Burning coal, oil,
and other fossil fuels releases heat-trapping gas, such as carbon dioxide (CO2), into the atmosphere.”
Burning fossil fuels produces carbon dioxide
Human activities
We burn lots of fossil fuels -Transportation (cars, busses, etc.)-Heating-Cooking-Electricity-FactoriesAll of this releases lots of carbon dioxide CO2 into the air.
We are adding carbon to the air faster than it can be removed through photosynthesis. Because of this, there is more carbon dioxide today than there has ever been!
Human ActivitiesDeforestation (Cutting down lots
of trees) Allows too much carbon dioxide (CO2) into the air.Less trees means less photosynthesis, so more CO2.
What can we do??Human Activity that can REDUCE (decrease) the amount of Carbon
• USE LESS ELECTRICITY – Electricity is one of the biggest producers
of carbon. Every time you make toast or turn on the TV, you are adding to global warming.
– Turn it off when not in use (lights, TV, DVD player, computer, etc....)
• Recycle paper and plant more trees