Digestion CO2
Organic molecules
Oxygen (O2)
Cellular respiration

(Words may be used more than once)

Carbon atoms enter the child as part of . These will first be broken into smaller molecules by . These smaller molecules contain the same energy. The child needs oxygen so that his cells can perform . This process transforms energy into . The carbon atoms leave the child in .

Organic molecules

Digestion  

Cellular respiration

CO2

Explanation:

Carbon atoms enter the child as part of organic molecules. These will first be broken into smaller molecules by the process of digestion. These smaller molecules contain the same amount of energy. The child needs oxygen so that his cells can perform cellular respiration. This process transforms chemical energy into energy, carbondioxide gas and water. The carbon atoms leave the body of the child in the form of carbondioxide gas through breathing process..

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