Nutrient Cycle

What form does nitrogen appear in the atmosphere?

• N₂

• NO₃-

• NH₄+

What is special about the nitrogen cycle?

• Bacteria is needed to convert nitrogen to usable form by plants

• Plants absorb the nitrogen by osmosis

• Plants used nitrogen like they do carbon dioxide, nothing special

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NGSS.MS-LS2-3

What do denitrifying bacteria do?

• convert N2 in atmosphere to nitrates for the plants to use

• convert NO₃ and NH₄ waste to nitrogen in the atmosphere

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NGSS.MS-LS2-3

Why is Nitrogen important?

• energy source

• main part of amino acids --> proteins

• insulation

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NGSS.MS-LS1-5

NGSS.MS-LS2-3

How do carnivores get nitrogen?

• directly from the atmosphere

• from the bacteria

• from plants or animals that eat plants

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NGSS.MS-LS2-1

What form is C in the atmosphere?

• stored C

• glucose, C₆H₁₂O₆

• carbon dioxide, CO₂

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

What is the role of producers in the carbon cycle?

• take CO₂ in from the atmosphere during photosynthesis and make glucose, C₆H₁₂O₆

• take CO₂ in from the atmosphere to use in cellular respiration to make stored C

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NGSS.MS-LS1-6

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How does carbon enter the food chain?

• used by plants in photosynthesis to make glucose to be used by plants & animals

• consumers use it in photosynthesis to make their own food

• plants and animals breathe in CO₂ in the air

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

How are the carbon cycle and the greenhouse effect related?

• vehicle emissions and deforestation lead to increase amounts of CO2 in atmosphere --> increase greenhouse gases --> more heat trapped in --> higher temps

• more carbon dioxide in the atmosphere, the more greenhouse gases, less heat is leaves, lower temps

• no relationship

• less carbon dioxide, the less greenhouse gases, the higher temps

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According to the graph, when did the amount of greenhouse gases increase?

• Day 1

• Day 2

• Day 3

• Day 4

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NGSS.MS-ESS3-5