…carbon dioxide from the atmosphere, and release…

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Presentation transcript:

…carbon dioxide from the atmosphere, and release… The activities of living things keep the levels of oxygen and carbon dioxide in the atmosphere balanced… Plants remove… …carbon dioxide from the atmosphere, and release… …oxygen when they… …PHOTOSYNTHESISE.

Animals, plants and microbes remove… …oxygen from the atmosphere, and release… …carbon dioxide when they… …RESPIRE.

oxygen from the atmosphere, and releases… Burning fuels also removes… oxygen from the atmosphere, and releases… …carbon dioxide.

Carbon atoms on the planet Earth are constantly being recycled. The Carbon Cycle Carbon atoms on the planet Earth are constantly being recycled. Photosynthesis converts carbon dioxide from the atmosphere into biomass. Other chemical and biological processes release carbon dioxide from biomass into the atmosphere.

CO2 in atmosphere and oceans Combustion Respiration Photosynthesis Feeding Death Excretion Formation of Fossil Fuels COW Decomposers

There are many ways to draw the carbon cycle… Carbon dioxide in the air Plants Animals Decay Burning of fossil fuels Respiration by decomposers Photosynthesis Respiration Feeding Death and Excretion … make sure you understand the carbon cycle, and… … do not learn it parrot fashion!

Tasks: Draw out your own version of the carbon cycle. 2. What would be the effect of the following on the amount of oxygen in the atmosphere? an increase in the number of plants. an increase in the burning of fossil fuels. an increase in the number of animals. 3. How many ways can you think of increasing the amount of carbon dioxide in the atmosphere? List them.

Deforestation Deforestation increases the amount of carbon dioxide in the atmosphere: • Removing plants decreases the rate of photosynthesis • The removed trees are often burnt • Waste plant material can be left to rot • The cleared land is often used to farm animals like cattle, increasing the rate of respiration • Increased industrial activity increases the use of fossil fuels