The Water Cycle and Human Impact on Biogeochemical Processes

The video discusses biogeochemical cycles, focusing on the water cycle. It explains the steps of the water cycle, including precipitation, infiltration, runoff, evaporation, transpiration, and condensation. The video also highlights the role of water in biological processes like cellular respiration and photosynthesis. Finally, it addresses human impacts on the water cycle, such as deforestation, pollution, and eutrophication.

What is a biogeochemical cycle?

• A cycle that involves only living organisms

• A cycle that involves only nonliving components

• A cycle that involves the movement of matter through living and nonliving parts of an ecosystem

• A cycle that involves the movement of energy through an ecosystem

What percentage of Earth's water is freshwater?

• 10%

• 50%

• 3%

• 97%

What is the process called when water seeps underground and accumulates in aquifers?

• Evaporation

• Transpiration

• Condensation

• Infiltration

Which process involves water vapor rising from plants into the atmosphere?

• Precipitation

• Condensation

• Transpiration

• Evaporation

What is the role of water in photosynthesis?

• Water is not involved in photosynthesis

• Water is used to break down food for energy

• Water is used to make sugar

• Water is a byproduct of photosynthesis

How does deforestation impact the water cycle?

• Increases transpiration

• Decreases precipitation

• Decreases transpiration

• Increases precipitation

What effect does urban development have on the water cycle?

• Increases runoff

• Decreases evaporation

• Decreases runoff

• Increases infiltration

What is eutrophication?

• A process where water becomes too salty

• A process where water becomes too acidic

• A process where water loses all its nutrients

• A process where water becomes overly enriched with nutrients

What happens to aquatic plants during eutrophication?

• They thrive due to increased nutrients

• They die due to lack of sunlight

• They produce more oxygen

• They become more diverse

How does pollution affect the water cycle?

• It has no effect

• It only affects the atmosphere

• It enhances the water cycle

• It disrupts the natural processes