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

Water only

None of them

Nitrogen and phosphorus only

carbon only

All of them (water, carbon, nitrogen, and phosphorus)

1. Physical processes like evaporation and condensation are the main driving forces behind the _________ cycle.
   
   

phosphorus

water

carbon

nitrogen

1. What is the source of energy that supports the growth of most producers?
   
   

Calories in food (organic matter)

Carbohydrates and lipids

Heat

Sunlight

1. Which of the following are involved in biogeochemical cycles?
   
   

Living producers

Living consumers

Decomposers and detritivores

Land, air, and water

All of the above

1. Turkey vultures soar high in the sky until they detect dead animals with their supremely sensitive noses. They then swoop down and eat the dead flesh. Which of the following terms accurately describe turkey vultures? Select all that apply.
   
   

producers

consumers

detritivores

decomposers

1. Which human activity reduces transpiration and can reduce rainfall in the affected region?
   
   

fertilizer use

buring fossil fuels

deforestation

damming rivers