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WorksheetsChapter 4 Scott Foresman
Total questions: 19
Worksheet time: 10mins
Why do chipmunks in the Great Smoky Mountains survive?
their needs are met in that environment
they have driven out all other chipmunks
humans feed them, which helps them survive
humans have moved them from cities to the mountains
Which describes a balanced ecosystem?
there is enough food for people to exist
one type of animal and plant depend on each other
no animal or plant drives out other animals or plants
humans create shelter and food for animals and plants
A meadow has too many rabbits. What would help balance this ecosystem?
more rain that grass needs
more foxes that eat rabbits
fewer foxes that eat rabbits
more grass for rabbits to eat
How do these organisms interactions help balance their ecosystem?
rabbits make homes in grass
grass and rabbits both need oxygen
grass depends on rabbits to protect it
grass makes oxygen, and animals use it
How would an ecosystem change if the rabbits that were the main prey for foxes became sick and died?
the foxes would find new prey
the number of foxes would decrease
the number of foxes would increase
the foxes and rabbits would compete for food
What impact does a parasite have in an ecosystem?
helps the entire ecosystem
hurts one organism and helps another
helps both the host organism and the parasite
hurts both the host organism and the parasite
Which would cause an ecosystem to change quickly?
an earthquake
a lake drying up
a climate change
a lake becoming a marsh
What might be the effect on an ecosystem of a climate change from rainy to dry?
no change
a change from plants to animals
a change from forest to marsh
a change in the kinds of plants and animals that live there
What could scientists tell from a fish fossil found in the desert?
that fish is now extinct
fish once had legs to travel
fish once lived in dry places
the desert was once a sea or lake
What might be a reason an animal becomes extinct?
it is a predator
it produces oxygen
its habibat is destroyed
it adapts to its environment
How are a hawk and an a owl able to succeed, even through they compete for food?
the hawk eats the owl
the owl changes its diet
one animal moves to a different habitat
one hunts at night, the other hunts during the day
What is one way people can disturb the balance of an ecosystem?
breathing air
planting trees
riding bicycles
building houses
How can damage from strip mines be repaired?
erosion can fill the hole
mining companies can replace the soil
rain can wash the rock away into rivers
mining companies can go mine in another place
Why did the United States establish national parks?
to make money for the national government
to provide Americans with a great vacation spot
to preserve nature's beauty and habitats of plants and animals
to give Americans a chance to see things they've never seen before
Who gets helped?
parasite
host
Who gets harmed?
parasite
host
How does a flood change an ecosystem?
quickly
slowly
What does a flood do to the plants of an ecosystem?
helps them
kills them
If a flood kills much of the plants, what happens to the animals?
they have enough to eat
they don't have enough to eat and must migrate or they could die
