Question

1. Which of the four major biogeochemical cycles aresignificantly affected by human activities?

1. Water only
2. None of them
3. Nitrogen and phosphorus only
4. carbon only
5. All of them (water, carbon, nitrogen, and phosphorus)

2. Physical processes like evaporation and condensation are themain driving forces behind the _________ cycle.

1. phosphorus
2. water
3. carbon
4. nitrogen

3. What is the source of energy that supports the growth of mostproducers?

1. Calories in food (organic matter)
2. Carbohydrates and lipids
3. Heat
4. Sunlight

4. Which of the following are involved in biogeochemicalcycles?

1. Living producers
2. Living consumers
3. Decomposers and detritivores
4. Land, air, and water
5. All of the above

5. Turkey vultures soar high in the sky until they detect deadanimals with their supremely sensitive noses. They then swoop downand eat the dead flesh. Which of the following terms accuratelydescribe turkey vultures? Select all that apply.

1. producers
2. consumers
3. detritivores
4. decomposers

6. Which human activity reduces transpiration and can reducerainfall in the affected region?

1. fertilizer use
2. buring fossil fuels
3. deforestation
4. damming rivers