Carbon and 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-LS2-3

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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.HS-ESS2-6

NGSS.HS-LS1-7

NGSS.HS-LS2-5

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-LS2-3

NGSS.MS-LS1-6

features of environment that are alive or were once alive

• biotic

• abiotic

• inbiotic

• biography

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NGSS.MS-LS4-1

How much of the atmosphere is composed of nitrogen gas?

• 87%
• 38%
• 78%
• 21%

Why do all organisms need nitrogen?

• To live and grow 
• To build phosphorus
• To make oxygen levels grow
• To help blood circulate better

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NGSS.MS-LS2-3

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NGSS.MS-LS2-1

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

Nitrogen fixing bacteria, lives in nodules on the root of a plant called

• Broccoli
• Legumes
• Beats
• Carrots

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NGSS.MS-LS2-1

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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.MS-ESS2-1

The average temperature of the surface of Earth has increased approximately 1°C in the past century. Which reason best explains this increase in temperature?

• lower levels of ozone in the atmosphere
• lower levels of nitrogen in the atmosphere
• higher levels of carbon dioxide and other greenhouse gases in the atmosphere
• higher levels of oxygen in the atmosphere

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NGSS.MS-ESS3-5