Biogeochemical Cycles Test Makeup

Biogeochemical cycles are best described as the movement of _________ factors throughout an ecosystem.

• Abiotic
• Biotic
• Limiting
• Important

In the water cycle, what happens when water vapor turns into tiny water droplets in the atmosphere?

• Evaporation
• Precipitation
• Condensation
• Sublimation

What is the primary source of energy for driving biogeochemical cycles on Earth?

• Geothermal Heat
• The Sun
• Fossil Fuels
• Wind

Which biogeochemical cycle involves the conversion of atmospheric nitrogen gas (N2) into a form that plants can use?

• Nitrogen Cycle
• Water Cycle
• Carbon Cycle
• Phosphorus Cycle

How do human activities like deforestation and burning fossil fuels impact biogeochemical cycles?

• They have no significant impact on the cycles.
• They accelerate the cycles, leading to more efficient nutrient transfer.
• They disrupt the cycles, leading to imbalances and environmental issues.
• They only affect the water cycle.

In the phosphorus cycle, what is the primary way phosphorus enters terrestrial ecosystems?

• Atmospheric deposition
• Weathering of rocks
• Volcanic activity
• Plant respiration

What is the term for the process by which atmospheric nitrogen is converted into a form that can be used by plants?

• Nitrogen Fixation
• Deaerification
• Combustion
• Decomposition

Which greenhouse gas associated with the carbon cycle contributes to global warming?

• Oxygen (O2)
• Carbon Dioxide (CO2)
• Nitrogen (N2)
• Water Vapor (H2O)

How does nitrogen primarily return to the atmosphere in the nitrogen cycle?

• Through plant uptake
• Through photosynthesis
• Through denitrification
• Through ammonification

Through which process does CO2 get absorbed into the Earth?

• Burning of fossil fuels
• Photosynthesis
• Respiration
• Car exhaust emissions