NGSS.HS-LS2-3

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

How much energy is passed on to each trophic level in an energy pyramid?

• 10%
• 90%
• 50%
• 80%

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NGSS.HS-LS2-3

The arrows in a food chain or web represent ...

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

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NGSS.HS-LS2-3

A correct path that nitrogen could take would be

• air -> animals -> plants -> bacteria

• animals -> air -> bacteria -> plants

• bacteria -> air -> plants -> animals

• air -> bacteria -> plants -> animals

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NGSS.HS-LS2-3

Some organisms in an ecosystem are represented in the pyramid below. In the pyramid, the arrows labeled X represent

• the loss of organisms due to predation

• a decrease in photosynthetic organisms

• the loss of energy in the form of heat

• a decrease in available oxygen

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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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NGSS.HS-LS2-3

Which of the three steps of cellular respiration is anaerobic?

• Glycolysis
• Citric Acid Cycle
• Kreb's Cycle
• Electron Transport Chain

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NGSS.HS-LS2-3

The diagram shows the flow of organic molecules through an ecosystem. What two processes are identified by the labels X and Y?

• X : Respiration
  Y : Predation
• X : Adaptation
  Y : Decomposition
• X : Fermentation
  Y : Nitrogen Fixation
• X : Decomposition
  Y : Respiration

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NGSS.HS-LS2-3

The most important factor in converting nitrogen into usable forms during the nitrogen cycle is...

• Animals

• Plants

• Bacteria

• Decomposers

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NGSS.HS-LS2-3

What do the arrows show in a food chain?

• They point to the smallest animals

• They point to the animal that tastes the best

• They point to just the producers

• They point in the direction that energy is flowing

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NGSS.HS-LS2-3