Ecosystems - Limiting Factors

Limiting factors are sometimes helpful because they can keep the population from getting too large.

• True
• False

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Any thing or organism that regulates the size of a population of another organism is known as __________.

• a limiting measure
• a limiting factor
• factorization
• materialization of precipitation

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If a disease destroying barley plants swept through an ecosystem, what would happen to the bird population that eat barley plants?

• The bird population would stay the same

• The bird population would infinitely increase

• The bird population would decrease

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NGSS.MS-LS2-4

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What is a producer?

• Organism that makes its own energy

• Organism that breaks down dead organisms

• Organism that eats other organisms for food & energy

• Organism that makes its own food

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What is a consumer?

• Organism that makes its own energy

• Organism that breaks down dead organisms

• Organism that eats other organisms for food & energy

• Organism that makes its own food

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NGSS.MS-LS2-3

What happens when an environment reaches its carrying capacity?

• Populations will decrease
• Resources such as food, water, and space will be unlimited
• Populations will increase
• Nothing, everything will stay the same.

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NGSS.MS-LS2-4

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What will happen if all of the frogs in a population die?

• The frogs' predators will decrease and the frogs' prey will increase

• The frogs' predators will increase and the frogs' prey will decrease

• We better all pray because there isn't anymore frogs.

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NGSS.MS-LS2-4

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Which is NOT needed in order to calculate reproductive potential?

• percentage of females in the population
• survival rate of offspring
• what the organism eats
• at what age females reproduce

The largest number of organisms in a population that the environment can support. 

• Carrying Capacity
• Limiting Factor
• Reproductive Potential

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NGSS.MS-LS2-1

What are some abiotic factors that could be limiting factors in the Iowa River ecosystem?

• Temperature, fertilizer runoff from fields, drought or flood

• Invasive species, floods

• Temperature, predators, droughts, floods, over fishing

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NGSS.MS-LS2-4

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