Carbon and Nitrogen Cycle Lesson

Match

Match the Definition to the correct Vocabulary word

• Storage location for matter

• Conversion of nitrogen gas into usable forms

• Conversion of ammonia into nitrates

• Conversion of nitrates into nitrogen gas

• exchange of matter through the biosphere

Sink

Nitrogen fixation

Nitrification

Denitrification

Biogeochemical cycle

• Sink

• Nitrogen fixation

• Nitrification

• Denitrification

• Biogeochemical cycle

Dropdown

The carbon cycle is most

closely associated with

​

Select answer

. The nitrogen cycle includes

the ​

Select answer

and returns

to the soil through animal

wastes and by

​

Select answer

Multiple Choice

When humans burn fossil fuels, most of the carbon quickly enters the                       as carbon dioxide.

• Water
• Atmosphere
• Sun
• Air

Multiple Select

Check all the ways that carbon dioxide is ADDED to the atmosphere.

• Respiration

• Combustion

• Photosynthesis

• Diffusion

• Decomposition

Multiple Choice

Which is a true statement?

• Humans depend on oxygen, plants depend on carbon dioxide

• Plants produce carbon dioxide

• Humans depend on carbon dioxide, plants depend on oxygen

• Humans don't depend on plants for the air they need

Multiple Choice

Human activity: Deforestation

• Increase the amount of atmospheric carbon dioxide

• Decrease the amount of atmospheric carbon dioxide

Match

Match the following

• Process where producers, consumers, and decomposers release energy and CO2 from food

• Process where fuels are burned to produce carbon dioxide and water.

• Process where producers use light energy and carbon dioxide to make sugars.

• Process where dead bodies form fossils/fossil fuels 

cellular respiration

combustion

photosynthesis

fossilization

• cellular respiration

• combustion

• photosynthesis

• fossilization

Multiple Choice

How much of the atmosphere is composed of nitrogen gas?

• 87%
• 38%
• 78%
• 21%

Multiple Choice

How does lightning contribute to the nitrogen cycle?

• By releasing nitrogen gas into the atmosphere

• By converting atmospheric nitrogen into nitrates

• By decomposing organic matter

• By fixing nitrogen directly into plants

Multiple Choice

Which organisms play the largest role in converting nitrogen into various usable forms and back to a gas form?

• rabbits

• bacteria

• plants

• worms