Question

   Define the following.      

1. Phytoplankton


2. Nitrogen cycle

3. Alternative Fuels 

4. Acid Rain

6. Eutrophication

7. Bio geochemical cycles

8. Revolution

9. Nuclear waste

10. Equinox​

Answer 1

Answer:

acid rain: rain that has harmful chemicals in it from factories, etc. that causes damage to trees, crops, buildings and rivers

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Answer 2

1. Phytoplankton are the autotrophic components of the plankton community and a key part of ocean and freshwater ecosystems. The name comes from the Greek words φυτόν, meaning "plant", and πλαγκτός, meaning "wanderer" or "drifter".