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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NGSS.HS-LS2-3

This diagram shows the amount of energy that moves from one feeding level to another in a food web.

• Energy Pyramid
• Food Web
• Ecosystem
• Food Chain

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diagram that shows the energy available to each trophic level in an ecosystem; 10% is passed on to upper levels, the rest is lost as heat

• succession 
• cellular respiration
• energy pyramid
• biochemical cycle

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Anaerobic respiration.....

• doesn't require CO2
• requires CO2
• doesn't require oxygen
• requires oxygen

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The diagram represents a model of a food pyramid.  Which statement best describes what happens in this food pyramid?

• More organisms die at higher levels than at lower levels, resulting in less mass at higher levels.
• Energy is lost to the environment at each level, so less mass can be supported at each higher level.
• When organisms die at higher levels, their remains sink to lower levels, increasing the mass of lower levels.
• Organisms decay at each level, and thus less mass can be supported at higher levels

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What process occurs when dead plant and animal matter decomposes and nitrogen is released back into the atmosphere?

• Assimilation

• Fixation

• Ammonification

• Denitrification

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In this food chain, the snake would be a

• tertiary consumer

• secondary consumer

• primary consumer

• producer

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Which of the following best describes the movement of energy in an ecosystem?

• Energy is constantly recycled by decomposers for use by producers.

• Energy is harnessed by producers, and available energy decreases with each trophic level transfer.

• Energy is absorbed by plants through water and soil and then moves up the food chain through consumers.

• Energy is magnified as it moves up the trophic levels, and tertiary consumers store the most energy in a food web.

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If a primary consumer contains 1,000 kcal of energy, the secondary consumer gains how much energy when it eats the primary consumer?

• 1,000 kcal

• 100 kcal

• 10 kcal

• 10,000 kcal

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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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