NGSS.HS-LS2-3

The arrows in a food chain or web represents what?

• They point to the organism that is being eaten.
• It shows how sunlight flows within an ecosystem.
• They show what direction the energy is flowing between organisms. 
• They represent how water is transferred within a habitat.

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In the energy pyramid here, which organisms have the most energy available?

• Producers
• Carnivores
• Herbivores
• Top Predator

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NGSS.HS-LS2-3

What percent of energy is transferred between trophic levels in an energy pyramid?

• 10%
• 50%
• 100%
• 25%

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Choose the correct sequence for energy flow within an ecosystem

• Herbivores --> producers --> carnivores --> scavengers

• Producers --> herbivores--> carnivores --> scavengers

• Producers --> carnivores --> herbivores--> carnivores

• Scavengers--> carnivores --> herbivores--> producers

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NGSS.HS-LS2-3

In the energy pyramid below, which organism has the least amount of energy available?

• Producers
• Herbivores
• Carnivores
• Top Predator

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NGSS.HS-LS2-3

In this food chain, the snake would be a

• tertiary consumer

• secondary consumer

• primary consumer

• producer

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Denitrification is when...

• Nitrogen gas is converted to ammonia/ammonium

• Ammonia is converted to nitrates and nitrites

• Nitrates are converted to nitrogen gas

• Plants absorb ammonium and nitrate to create DNA

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NGSS.HS-LS2-3

A living organism that puts materials from dead  plants and animals back to the soil is called a ____________?

• carnivore
• decomposer
• herbivore
• omnivore

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Organisms that break down dead plants & animals and release nitrogen back into atmosphere...

• bacteria
• plants
• animals
• producers

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NGSS.HS-LS2-3

Can eutrophication happen naturally? If so, how?

• No

• Sometimes, but it is incredibly rare

• Yes, when dead organisms and wastes decay

• Yes, when there are too much rain

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NGSS.HS-LS2-3