Environmental Science Unit 4 Test

In the town of Podunk, Alabama the population at the beginning of the year was 4882. If 27 babies were born in that given year, what is the birth rate?

Births/Pop = then x 1000 = Birth Rate

• 7.66

• 9.22

• 5.53

• 2.78

What is carrying capacity?

• A limit to the amount of births allowed in a year

• The total amount of food available in a given area to support a population

• The amount of weight a person can hold up while laughing

• The amount of times you have to help a friend each day

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What are some factors that might decrease a population in an area?

• Disease

• Emigration

• Natural Disasters

• Death Rate

• All of the above

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Which continent will see the greatest decline in population over the next 50 years?

• Asia

• North America

• Africa

• Europe

When a predator's prey dies off, what usually happens to the predator?

• The migrate to some other place or starve and die

• Their population goes up

• The population stays the same

• They all die no matter what

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What might happen to the human population when it reaches its carrying capacity?

• Everyone will die off immediately

• Humans will stop having kids responsibly

• People will start starving and fighting for the limited resources

• The population will continue to go up unimpeded

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Biodiversity is

• Good for an ecosystem

• Bad for an ecosystem

• Doesn't help or hurt an ecosystem

• Means someone likes to do homework

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Which species would benefit from the grasshopper dying off?

• Butterfly and Berries

• Snake

• Plantain, Butterfly, and Berries

• Ladybird and Rabbit

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Which species would be harmed or die off from the mouse dying?

• Snake and Buzzard

• fox and buzzard

• Plaintain

• Rabbit, Fox, Buzzard, and Snake

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If a disease came along a killed off a bunch of the frogs, which species populations would go up?

• Grasshopper and Rabbit

• Snake and Ladybug

• Greenfly, Butterfly, and Snake

• Butterfly, Dragonfly, and Grasshopper

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