why do chipmunks in the great smoky mountains survive? a.their needs are met in that environment...
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Why do chipmunks in the Great Smoky Mountains survive?
a. Their needs are met in that environmentb. They have driven out all the other chipmunksc. Humans feed them, which helps them
survived. Humans have moved them from cities to the
mountains
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Which describes a balanced ecosystem?
a. There is enough food for people to existb. One type of animal and plant depend on
each otherc. The food supply, living space, and shelter for
animals and plants is plentifuld. Humans create shelter and food for animals
and plants
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A meadow has too many rabbits.What would help balance
this ecosystem?
a. More rain that grass needsb. More foxes that eat rabbitsc. Fewer foxes that eat rabbitsd. More grass for rabbits to eat
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How do these organisms interactions help
balance their ecosystems?
a. Rabbits make homes in grassb. Grass and rabbits both need oxygenc. Grass makes oxygen, and animals use itd. Grass depends on rabbits to protect it
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How would an ecosystem change if the rabbits that were the main prey for
foxes became sick and died?
a. The foxes would find new preyb. The number of foxes would increasec. The number of foxes would decreased. The foxes and rabbits would compete for
food
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What impact does a parasite have in an ecosystem?
a. Helps the entire ecosystemb. Hurts one organism and helps anotherc. Helps both the host organism and parasited. Hurts both the host organism and parasite
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Which would cause an ecosystem to change quickly?
a. An earthquakeb. A lake drying upc. A climate changed. A lake becoming a marsh
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What might be the effect on an ecosystem of a climate change from
rainy to dry?
a. No changeb. A change from plants to animalsc. A change from a forest to marshd. A change in kinds of plants and animals
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What could scientists tell from a fish fossil found in a desert?
a. That fish is now extinctb. Fish once had legs to travelc. Fish once lived in dry placesd. The desert was once a sea or lake
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What might be a reason an animal becomes extinct?
a. It is a predatorb. It produces oxygenc. Its habitat is destroyedd. It adapts to its environment
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How are a hawk and an owl able to succeed, even though they
compete for food?
a. The hawk eats the owlb. The owl changes its dietc. One animal moves to a different habitatd. One hunts at night, and the other hunts
during daytime
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What is one way people can disturb the balance of ecosystems?
a. Breathing airb. Planting treesc. Riding bicyclesd. Building houses
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How can damage from strip mines be repaired?
a. Erosion can fill the holeb. Mining companies can replace the soilc. Rain can wash the rock away into riversd. Mining companies can go mine in
another place
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Why did the United States establish national parks?
a. To make money for the national governmentb. To provide Americans with great vacation
spotsc. To preserve nature’s beauty and habitats of
plants and animalsd. To give Americans a chance to see things
they’ve never seen before