Plants remove…

1. 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.

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

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

4. 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.

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

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

7. 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.

8. Deforestation increases the amount of carbon dioxide in the atmosphere: • 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 Deforestation • Removing plants decreases the rate of photosynthesis • Increased industrial activity increases the use of fossil fuels