Fourth Grade Science - Ecosystem Balance Test Review Sheet

Hibernating through the winter is a behavioral adaptation.

• True

• False

Animals often change their diet if the usual source of food cannot be found.

• True

• False

When there is a change to an environment like the temperature of water dropping or a lack of food, the population of organisms may be affected. True or False?

• True

• False

One way that wolves adapt to cold weather is to develop a heavier coat of fur that they then shed in the spring.

• True

• False

When trees are cut down in a rainforest, the health of the entire ecosystem is affected.

• True

• False

Beavers build dams and lodges in streams. These dams and lodges allow water to accumulate in the stream so that plants in the area receive the water they need to stay alive.

• True

• False

When an organism is removed or added to an ecosystem, it can disrupt the balance of the ecosystem causing other organisms to be affected.

• True

• False

An invasive species can be introduced through human interaction with an ecosystem.

• True

• False

Birds migrating to warmer environments in winter is an example of a behavioral adaptation.

• True

• False

An example of interdependence is a plant's need for carbon dioxide that animals exhale and the food plants provide for animals.

• True

• False