Ecology Review

Non-living factor that affects an ecosystem

• biotic factor
• abiotic factor
• food chain 
• biome

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NGSS.MS-LS2-3

90% of the energy that gets lost as you move up a food pyramid or chain gets lost as

• pollution to the environment

• heat to the environment

• energy for decomposers

• gets recycled

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NGSS.MS-LS2-3

What percentage of energy is passed on to the next trophic level?

• 5%

• 10%

• 50%

• 90%

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NGSS.MS-LS2-3

In some environments, wolves prey on deer for their source of food. If all of the wolves were taken from the environment, what would most likely happen to the deer population?

• A The deer population would increase and begin to compete for food.

• B The deer population would become larger and healthier animals.

• C The deer population would decrease, because there would be an increase in disease.

• D The deer population would change color, because they would not have to hide from wolves.

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NGSS.MS-LS2-4

High biodiversity is a sign of a healthy ecosystem.

• True

• False

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When brown tree snakes were accidentally introduced onto the island of Guam, they had no natural predators. These snakes sought out and ate many eggs of insect-eating birds. What probably occurred following the introduction of the brown tree snakes?

• The insect population began to seek a new food source.

• The bird population increased.

• The bird population began to seek a new food source.

• The insect population increased

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NGSS.MS-LS2-2

NGSS.MS-LS2-4

What is a producer?

• an organism that gets energy from eating other organisms

• an organism that uses sunlight or chemical energy to make its own food

• an organism that gets energy from eating dead organisms, non-living material or waste

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NGSS.MS-LS2-3

A tree is an example of a ....

• composer

• decomposer

• producer

• omnivore

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NGSS.MS-LS2-3

If several species of carnivores are removed from an ecosystem, the most likely effect on the ecosystem will be

• An increase in the kinds of autotrophs

• A decrease in the number of abiotic factors

• A decrease in stability among populations

• An increase in the rate of succession

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

All of the living and nonliving things in an area that interact with each other are called a/an ______.

• community
• habitat
• population
• ecosystem

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