LS.2.A.1 Resources and Population Size

How can resources effect a population?

• Resources have no effect on a population

• The amount of resources available can cause a population to increase or decrease.

• The less resources available will cause a population to increase

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If there is less food and shelter available to a prey animal like mice, how will that effect the population?

• The mice population with increase

• The mice population will decrease

• There will be no change

• The mice population will rapidly increase and then decrease slowly.

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Scientists have been studying four populations in a swamp area. In this area, alligators eat gar (a type of large fish), and both gar and diving ducks eat crabs.

The data showed that recently the alligator population has decreased. How could the decrease in the alligator population affect the other populations?

• Gar population=increases

  Crab & Diving duck population= decreases

• The populations of Gar, Crab, and Diving duck all decrease

• Gar population= decrease

  Crab & Diving duck population=increase

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A large population of ducks lives in an area with a lake. In the last 40 years, the size of the duck population has stayed the same. What must be true about the duck population during the last 40 years?

• The number of ducks that were born was the same as the number of ducks that died.

• No ducks were born and no ducks died.

• The ducks did not have any baby ducks during these years.

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What year did the deer population start to decrease?

• 1971

• 1972

• 1974

• 1979

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How are the wolf and deer populations related?

• When Deer population increase, then Wolf population increase

• Deer and Wolf population are not related

• When Wolf population increase, then Deer population increase

• Both Deer and Wolf populations increase at the same time.

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Explain why the wolf population decreased 1976-1978.

• There were too many deer and the wolves were outnumbered

• The wolves eat deer. There were not enough deer for the wolves to eat.

• There was a drought and the wolves got tired.

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The number of individuals in a population at a given time is the _____.

• population size

• limiting factor

• ecosystem

• carrying capacity

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The Great Barrier Reef in Australia is home to 9,000 species of marine life. Florida's reef is home to 6,000 species of marine life. What could be a limiting factor to explain why Florida has fewer species?

• Australia has more predators than Florida

• Space and Shelter limit the number of species in Florida. There is less space in Florida's reef compared to the Great Barrier Reef.

• Food sources, Australia has warm water so there is less algae and plankton for the coral to eat.

• There is more competition in the Florida Reef since there are less species.

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A population will grow until _____.

• It gets tired

• There are too many resources available.

• The population reaches the carrying capacity and there are not enough resources

• The population has plentiful food, water, and Shelter.

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