Page 25 - 新思维科学学生用书9 样章

1 Photosynthesis and the carbon cycle

We are animals, so we get all of these carbon-containing nutrients when we eat plants or other animals.

Decomposers get their carbon when they break down waste products from plants and animals.

We can show how carbon gets into the bodies of animals and decomposers using a flow diagram.

carbon dioxide
in the air

photosynthesis

carbohydrates feeding carbohydrates
in plants in animals

feeding feeding

carbohydrates
in decomposers

Questions
1 a Draw a food chain with one plant and three animals in it.

b The arrows in your food chain represent energy passing from one organism to the next.
Do they also show how carbon atoms pass from one organism to the next? Explain your

answer.
2 The human body contains atoms of many different elements. Carbon is one of the most common
elements. Name three different compounds in your body that contain carbon atoms.

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