Ecosystems 1
True or false:
Only human activity changes ecosystems.
False.
What is an example of human activity?
A. Lightning starts a wildfire.
B. Deep snow lasts all winter.
C. A river floods in a rainstorm.
D. A new neighborhood is built.
D. A new neighborhood is built.
How do humans change the environment to make it more comfortable for them?
A. build shelters
B. create oceans
C. make mountains
D. change the weather
A. build shelters
There is a type of bird called a kiwi bird that cannot fly. What other purpose might its feathers have?
A. to keep it warm
B. to raise its young
C. to catch its food
D. to help it run faster
A. to keep it warm
Imagine that a grasslands area became a forest over time. Which species might move to this area if it became a forest?
A. bison
B. flamingo
C. otter
D. squirrel
D. squirrel
Why might deer become overpopulated?
A. There are few predators.
B. Human activity increases.
C. The deer start eating animals.
D. Winter was colder than normal.
A. There are few predators.
What is an invasive species?
A. a member of an army
B. a plant that steals sunlight
C. an organism in a new area
D. a predator over-hunting prey
C. an organism in a new area
Species adapt to their environment over time. Which change in desert plants is most likely if rainfall increases?
A. They will stop growing roots.
B. They will grow broad (wide) leaves.
C. They will start eating animals.
D. They will change flower color.
B. They will grow broad (wide) leaves.
A tidal pool is a coastal ecosystem. It occurs when tides rise and fall. Some water stays behind as the tide goes out. These pools become habitats for marine organisms. They cannot leave the pool until the tide returns. Describe what might happen if an invasive species drops into the tidal pool.
If an invasive species dropped into the tidal pool, it could use up all the resources such as oxygen and food. This would cause the native species to die.
Explain how a change in one species might affect the entire ecosystem.
An example could be if the species changes so that it no longer eats a certain type of animal, that animal becomes overpopulated because the predators decreased.