Energy Transformation in Food Web

What is the primary source of energy for most ecosystems?

• Nuclear power

• Sunlight

• Coal

• Wind

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NGSS.MS-LS1-6

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How does the second law of thermodynamics relate to energy flow in ecosystems?

• Energy tends to disperse and become less available for work as it is transferred through trophic levels.

• The second law of thermodynamics does not apply to energy flow in ecosystems

• Energy becomes more available for work as it is transferred through trophic levels

• Energy does not disperse as it is transferred through trophic levels

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NGSS.MS-LS2-3

What is a trophic level and how does it relate to food chains?

• A trophic level is the number of predators in a food chain, and it has no relation to energy flow

• A trophic level is a type of soil in an ecosystem, and it has no relation to food chains

• A trophic level is the position that an organism occupies in a food chain, and it represents the flow of energy and nutrients through an ecosystem.

• A trophic level is the temperature of an ecosystem, and it has no relation to nutrient flow

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NGSS.MS-LS1-6

NGSS.MS-LS2-2

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Describe the difference between a food chain and a food web.

• A food chain is a web of interconnected organisms, while a food web shows a linear flow of energy and nutrients

• A food chain is a complex network of interconnected organisms, while a food web is a simple linear flow of energy and nutrients

• A food chain shows a linear flow of energy and nutrients from one organism to another, while a food web consists of multiple interconnected food chains.

• A food chain consists of multiple interconnected food chains, while a food web shows a circular flow of energy and nutrients

Explain the concept of energy pyramids and how they represent energy flow in ecosystems.

• Energy pyramids visually show the increase in available energy as you move up the trophic levels in an ecosystem.

• Energy pyramids represent the distribution of water in an ecosystem.

• Energy pyramids visually show the decrease in available energy as you move down the trophic levels in an ecosystem.

• Energy pyramids visually show the decrease in available energy as you move up the trophic levels in an ecosystem.

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

What is the significance of producers in an energy pyramid?

• Producers are only found at the top of the energy pyramid

• Producers have no significance in an energy pyramid

• Producers consume energy from other organisms in the energy pyramid

• Producers provide the base of the energy pyramid by converting sunlight into energy through photosynthesis.

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

How does energy transfer occur in a food web?

• By plants absorbing sunlight directly

• By rocks releasing energy into the environment

• By water evaporating from the ecosystem

• By organisms consuming other organisms

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NGSS.MS-LS2-3

Describe the role of decomposers in energy transfer within a food web.

• Decomposers break down dead organic matter and release nutrients back into the ecosystem.

• Decomposers have no role in energy transfer within a food web.

• Decomposers only consume nutrients and do not release anything back into the ecosystem.

• Decomposers break down living organisms and release toxins into the ecosystem.

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NGSS.MS-LS2-3

Explain the concept of energy transfer efficiency in food webs.

• Amount of water transferred between organisms

• Percentage of energy transferred from one trophic level to the next

• Number of predators in a food web

• Color of the organisms in the food web

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3