Carbon, Water, Nitrogen Cycle

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

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which of the following add carbon dioxide to the atmosphere?

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

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NGSS.MS-ESS2-1

NGSS.MS-LS2-3

Plants release water into the atmosphere by 

• photosynthesis
• transpiration
• perspiration
• respiration

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NGSS.MS-ESS2-4

What is happening at 1?

• respiration: releasing CO₂
• decomposing CO₂ in the soil
• photosynthesis: absorbing CO₂
• turning CO₂ from the atmosphere into organic molecules

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

How much of the atmosphere is composed of nitrogen gas?

• 87%
• 38%
• 78%
• 21%

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NGSS.MS-PS1-1

How nitrogen is "fixed" into useable form for plants

• only through action of bacteria
• only through lightning
• through action of bacteria & lightning
• through photosynthesis

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NGSS.MS-LS2-3

How do living organisms return carbon to the atmosphere in the carbon cycle?

• respiration and photosynthesis
•  decomposition and respiration

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

• Water
• Atmosphere
• Sun
• Air

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NGSS.HS-ESS2-6

In the carbon cycle, producers take in the gas __

• carbon dioxide
• oxygen
• nitrogen
• carbon monoxide

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

What is the role of decomposers in an Ecosystem? 

• They recycle matter and nutrients to form fossil fuels
• They are burn and release as carbon dioxide
• Decomposers are responsible to turn oxygen into carbon dioxide
• They recycle energy back to the sun

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NGSS.MS-LS2-3