Study Jams Nitrogen Cycle

What is the nitrogen cycle?

• the process of chemically producing nitrogen to be used by plants and animals

• the process of continually recycling nitrogen from living things to non-living things between Earth and its atmosphere

• the process green plants use to make food

• the process of recycling carbon from living things to non-living things between Earth and its atmosphere

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How do humans get nitrogen

• by breathing in

• by drinking water

• by eating plants

• by producing it naturally in the digestive system

Which of the following comes first in the process of nitrification?

• Plants use nitrates to create protein.

• Bacteria in the plant turn the nitrogen gas into ammonia.

• Bacteria turns the nitrites into nitrates.

• Nitrogen gas travels from the air to the soil.

How do nitrates turn back into nitrogen gas?

• Animals release nitrogen gas when they breathe out during respiration.

• Plants give off nitrogen gas after they have used all the nitrates that they needed.

• Plants and animals die, and decomposers release nitrogen gas back into the air.

• Bacteria turn the nitrates back into nitrogen gas, which gets released through the roots of the plant and back into the air.

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Which of the following is one of the key components of the nitrogen cycle.

• carnivores

• rain

• the sun

• bacteria

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What do plants and animals use nitrates for?

• to produce sugars they need for energy

• to create the protein they need to live and grow

• to aid in photosynthesis and respiration

• to assist in digestion

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How are people upsetting the nitrogen cycle?

• by building up too much nitrogen in the air

• by creating too much bacteria in the soil

• by riding their bikes

• by breathing in too much nitrogen

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