Exploring Nutrient Cycles in Biology

What is the first step of the water cycle?

• Evaporation

• Condensation

• Precipitation

• Transpiration

Which process in the water cycle involves water vapor cooling and forming clouds?

• Infiltration

• Precipitation

• Evaporation

• Condensation

How does carbon return to the atmosphere from animals?

• Transpiration

• Photosynthesis

• Respiration

• Condensation

What are fossil fuels primarily composed of?

• Nitrogen

• Oxygen

• Hydrogen

• Carbon

What environmental issue is caused by an excess of CO2 in the atmosphere?

• Climate change

• Acid rain

• Ozone depletion

• Deforestation

Which organisms can fix nitrogen from the air into the soil?

• Plants

• Animals

• Bacteria

• Fungi

How can nitrogen be fixed into the soil besides bacterial action?

• Condensation

• Lightning

• Respiration

• Photosynthesis

What happens to nitrogen in the soil after plants absorb it?

• It evaporates

• It is stored in the roots

• It is released back into the air

• It is used for photosynthesis

What completes the nitrogen cycle?

• Transpiration

• Decomposition

• Condensation

• Evaporation

What is the main message of the conclusion?

• Only animals need nutrients

• Nutrient cycles are not important

• All living things are interconnected and need nutrient cycles

• Nutrient cycles are only for plants