02 Chapter 2B energy and geochemical cycles

The efficiency of energy transfer from a lower trophic level to the next highest level is roughly

• 1%
• 10%
• 100%
• 1000%

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What is the trophic level of the eagle?

• primary consumer

• secondary consumer

• tertiary consumer

• secondary and tertiary consumer

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In the energy pyramid here, how much of the energy in each trophic level gets lost as heat, is not absorbed through digestion, or is used for cellular respiration?

• 80%

• 90%

• 10%

• 20%

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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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An organism that gets energy from breaking down dead organisms, non-living material or waste is a(an) ___________.

• producer
• consumer
• decomposer
• autotroph

Organisms that create their own energy from sunlight or chemicals

• Herbivore
• Omnivore
• Autotroph
• Heterotroph 

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Biomass refers to

• Chemical Energy

• Light Energy

• Rank in the feeding heirarchy

• Amount of living tissue at a given trophic level

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The process of plants using energy from the sun, carbon dioxide, and water to create the biomass stored in the first trophic level is called?

• Photosynthesis

• Chemosynthesis

• Cellular Respiration

• Primary Producers

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How do plants get the nitrogen they need?

• from the air
• from the soil or water in which they live
• from the Sun
• from broken-down rocks

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Animals obtain the nitrogen they need directly from the

• soil in their habitat

• air they breathe

• plants and animals they eat

• bacteria living within them