Biogeochemical Cycles Worksheet
Explore the water, carbon, and nitrogen cycles with this Grade 7 science worksheet, featuring diagrams and various question types.
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Standards
Topics
Biogeochemical Cycles
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Date:
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Read each question carefully and answer to the best of your ability. Refer to the diagrams provided for assistance.
1. Look at the image below. Which process describes water turning into vapor and rising into the atmosphere?
Precipitation
Condensation
Evaporation
Runoff
2. Plants take in from the atmosphere during photosynthesis.
3. When organisms die, decomposers break down their remains, returning carbon to the .
4. Explain the role of nitrogen-fixing bacteria in the nitrogen cycle.
5. The burning of fossil fuels releases carbon dioxide into the atmosphere.
True
False
6. All living organisms require nitrogen to build proteins and nucleic acids.
True
False
Match each item on the left with the correct cycle on the right.
7. Evaporation
a. Carbon Cycle
8. Photosynthesis
b. Water Cycle
9. Denitrification
c. Nitrogen Cycle
Use the words below to complete the sentences.
10. The release of water vapor from plant leaves is called .
11. Animals release carbon dioxide into the atmosphere through the process of .