Ecosystem Energy Flow Quiz

The second law of thermodynamics states that energy transfers increase the overall disorder (entropy) in a system. How does this principle apply to the energy flow in an ecosystem?

• Energy decreases entropy as it moves through an ecosystem, making the process more efficient.

• Energy is perfectly transferred between organisms with no loss.

• Energy transfer between trophic levels is inefficient, with some energy lost as heat at each level, increasing the overall entropy.

• Energy is destroyed at each trophic level, reducing the total energy available in the ecosystem.

Tags

NGSS.MS-LS2-3

What symbol is used to illustrate the flow of energy through an ecosystem?

• Circles

• Arrows

• Lines

• Triangles

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

Identify the tertiary consumer in this food web.

• Seaweed

• Shrimp

• Bobcat

• Catfish

Tags

NGSS.MS-LS2-2

Which of the following is the BEST description for commensalism?

• A relationship that benefits both organisms

• A relationship that harms both organisms

• A relationship that does not affect one organism but benefits the other

• A relationship that harms one organism but benefits the other

In this ecosystem, 2,702 KJ of energy is available at the producer level. How much energy is available at the secondary consumer level?

• 27.02 KJ

• 270.2 KJ

• 2.702 KJ

• 2,702 KJ

Tags

NGSS.MS-LS2-3

In the context of an ecosystem, how does the second law of thermodynamics explain the limited energy availability for top predators?

• Top predators receive less energy because a significant portion of energy is lost as heat during each transfer, in accordance with the second law of thermodynamics.

• Top predators receive more energy because of the increased efficiency of energy transfer at higher trophic levels.

• Top predators receive equal amounts of energy as producers due to perfect energy conservation.

• Energy is destroyed at each trophic level, leaving top predators with minimal energy.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which of the following models would be used to illustrate the flow of energy through an ecosystem by showing the feeding patterns of all organisms within that ecosystem?

• Food chain

• Pyramid of numbers

• Food web

• Energy pyramid

Tags

NGSS.MS-LS2-3

Which of the following is the BEST description for mutualism?

• A relationship that does not affect one organism but benefits the other

• A relationship that harms both organisms

• A relationship that harms one organism but benefits the other

• A relationship that benefits both organisms

Tags

NGSS.MS-LS2-2

Identify an example of intraspecific competition.

• Hawk hunting a snake

• Parrots and monkeys living in a tree

• Two monkeys eating bananas.

In this ecosystem, 3,829.1 KJ of energy is available at the tertiary level. How much energy is available at the producer level?

• 38,291,000 KJ

• 382,910 KJ

• 38,291 KJ

• 3,829,100 KJ

Tags

NGSS.MS-LS2-3