Carbon1. What processes produce carbon

dioxide?2. What processes use carbon dioxide?3. Where else can we find carbon

dioxide?

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Carbon Cycle Production of Carbon Dioxide:– Respiration – Carbon dioxide released

in respiration.– Combustion – Burning fossil fuels (oil,

gas and coal) releases carbon dioxide. Where carbon dioxide is used:- Photosynthesis – Carbon dioxide used

by plants.

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Carbon Cycle Where else is it found:- Dissolved in the oceans. - In our atmosphere (only very small

amount though). - In dead remains (shells, bones)- In rocks (carbonates)

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Carbon Cycle Plants and Oceans – contain most of

the Earth’s carbon dioxide – they are called Carbon dioxide “sinks”.

Carbon dioxide is returned when dead remains are decomposed or combusted.

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Carbon Cycle Burning fuels:

Propane + Oxygen

C3H + 5O2 3CO2 + 4H2O

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Carbon Cycle

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Carbon Cycle 1. Draw a labelled diagram to show

how boiling a kettle contributes to the rising carbon dioxide levels.

2. Explain why the amount of carbon dioxide in the Earth’s atmosphere has risen in the last 50 years.

3. Complete exam-style questions on page 108.

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Review Objectives

I still feel unsure. I need some more help to understand.

I feel ok. I need to do some more work to check my understanding.

I am happy and feel I understand and can explain the main points.

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