Carbon and Nitrogen Cycle

Which of the following add carbon dioxide to the atmosphere?

• volcanoes
• combustion of fossil fuels
• animal and plant respiration
• all of these

Tags

NGSS.MS-ESS3-4

In nature, atmospheric nitrogen can be fixed by lightning and -

• Bacteria

• Plants

• Animals

• Water

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-1

Plants get usable nitrogen by absorbing it through their ​ (a)   .
Animals get usable nitrogen by ​ (b)   .

• roots
• eating other organisms
• leaves
• breathing air

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-1

Reorder these steps to show how excess nitrogen on land leads to a dead zone in the ocean and lakes.

• Algae die and sink to the bottom

• Dead algae are decomposed by bacteria

• Algae quickly use the nitrogen, causing an algae bloom

• Decomposition uses most of the oxygen in the water, causing a dead zone

• Runoff carries excess nitrogen into water

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-5

What process converts atmospheric nitrogen into a form usable by plants?

• Photosynthesis

• Combustion

• Nitrogen fixation

• Respiration

Tags

NGSS.MS-LS2-3

Which of the following removes carbon from the atmosphere?

• Combustion
• Respiration
• Photosynthesis
• Death

Tags

NGSS.MS-LS1-6

How does carbon in a grass plant get into a lion?

• The lion eats an antelope that ate the grass

• Carbon from grass doesn't end up in a lion.

• The lion absorbs the carbon given off by transpiration

• The lion breathes in carbon given out by the plant

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

TRUE or FALSE?
All of the carbon in existence is continually recycled in the carbon cycle.

• True
• False

Tags

NGSS.MS-LS2-3

NGSS.MS-ESS2-1

Building proteins and DNA is the reason organisms need what substance?

• Water
• Carbon
• Nitrogen
• Calcium

Tags

NGSS.HS-LS1-1

NGSS.HS-LS1-6

A correct path that nitrogen could take would be

• air -> animals -> plants -> bacteria

• animals -> air -> bacteria -> plants

• bacteria -> air -> plants -> animals

• air -> bacteria -> plants -> animals

Tags

NGSS.5-LS2-1