Nutrient cycling

Why is carbon essential for life?

• it is the most common element in the air
• it is made in photosynthesis and respiration
• it is necessary for life
• all macromolecules( Nucleic acids, proteins carbohydrates, and lipids) are based on carbon 

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NGSS.HS-LS2-5

What does NOT cycle within an ecosystem?

• energy
• carbon
• nitrogen
• water

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Which trophic level is affected most drastically by bioaccumulation of toxins within their tissues?

• producers
• primary consumers
• secondary consumers
• tertiary consumers

Which organisms allow all nutrients to be recycled within an ecosystem?

• fungi
• bacteria
• both fungi and bacteria
• neither fungi or bactera

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NGSS.HS-LS2-3

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What process involves returning fossil fuels to the atmosphere?

• combustion
• deforestation
• transpiration
• decomposition

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NGSS.HS-ESS2-6

The organisms that are responsible for turning nitrogen from the atmosphere into usable forms of nitrogen are

• soil invertebrates
• mammals
• bacteria
• fungi

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NGSS.MS-LS2-3

The carbon cycle is driven by two specific processes, what are they?

• combustion, respiration
• precipitation, nitrification
• condensation, precipitation
• photosynthesis; respiration

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NGSS.HS-ESS2-6

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What are two large areas where carbon is stored for long periods of time, or carbon sinks?

• plants and animals
• fossil fuels and oceans
• oceans and lakes
• fossil fuels and living organisms

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

What are two ways water moves back into the atmosphere?

• precipitation and runoff
• transpiration and precipitation
• evaporation and transpriation
• condensation and evaporation

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NGSS.MS-ESS2-4

Nitrogen is essential for life because

• it is needed for building proteins
• it is used to build all macromolecules (lipids, carbohydrates, nucleic acids and proteins)
• it is needed for making lipids 
• it is the most common element in living organisms