Biogeochemical Cycles Worksheet
Explore the fundamental biogeochemical cycles, including the water, carbon, nitrogen, and phosphorus cycles, and their importance in sustaining life on Earth.
Includes
Standards
Topics
Biogeochemical Cycles
Name:
Date:
Score:
Read each question carefully and answer to the best of your ability. Refer to your knowledge of biogeochemical cycles.
1. Which of the following processes releases carbon dioxide into the atmosphere?
Photosynthesis
Respiration
Nitrogen fixation
Denitrification
2. Which cycle does NOT involve a significant atmospheric component?
Water cycle
Carbon cycle
Nitrogen cycle
Phosphorus cycle
3. The conversion of atmospheric nitrogen into ammonia or other nitrogenous compounds by microorganisms is called .
4. Plants absorb water from the soil through their roots, a process known as .
5. The primary reservoir for phosphorus on Earth is in and sediments.
6. Deforestation can disrupt the carbon cycle by reducing the amount of carbon dioxide removed from the atmosphere.
True
False
7. Eutrophication is primarily caused by an excess of nitrogen and phosphorus in aquatic ecosystems.
True
False
8. Briefly explain the role of decomposers in the carbon cycle.
9. Describe one way human activities impact the nitrogen cycle.
10. Observe the diagram below, which illustrates a general biogeochemical cycle. Identify and label the components (e.g., atmosphere, producers, consumers, decomposers) and processes (e.g., photosynthesis, respiration, precipitation) that are common to most cycles.
