Biogeochemical Cycles Worksheet
An 8th-grade science worksheet covering the key concepts of biogeochemical cycles, including the water, carbon, and nitrogen cycles.
Includes
Standards
Biogeochemical Cycles
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Read each question carefully and answer to the best of your ability. This worksheet covers the major biogeochemical cycles.
1. Which of the following processes releases water vapor into the atmosphere from plants?
Condensation
Evaporation
Precipitation
Transpiration
2. How do animals primarily obtain carbon?
Breathing it in from the atmosphere
Absorbing it through their skin
Eating plants or other animals
Through photosynthesis
3. The process by which nitrogen gas from the atmosphere is converted into ammonia by bacteria is called .
4. When producers and consumers die, break down their organic matter, returning nutrients to the soil.
5. All water on Earth remains constant and does not move between different reservoirs.
True
False
6. Burning fossil fuels increases the amount of carbon dioxide in the atmosphere.
True
False
7. Briefly explain the role of photosynthesis in the carbon cycle.
8. Describe one way human activities impact the nitrogen cycle.