SCIENCE HOMEWORK 1

Write your name:

The phosphorus cycle is affected by artifical fertilizers.

• True

• False

For the oxygen cycle to take place, the process of photosynthesis is necessary.

• True

• False

Food chains is essential in the nitrogen and carbon cycle.

• True

• False

Animals get nutrients through the nitrogen directly from the air.

• True

• False

Answer explanation

Animals get nutrients from plants, and plants get it indirectly from the air and soils.

Fossil fuels are made up of dead animals and plants.

• True

• False

50% of the Earth's crust is made up nitrogen.

• True

• False

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