Study Jams Changes in Ecosystems

What is succession?

• the continuation of an ecosystem in its present state

• the balance between humans and nature in an ecosystem

• the way to stop pollution in an ecosystem.

• the gradual growth of new organisms in an ecosystem.

Changes in Ecosystems

Which of the following is a natural disaster that could wipe out an ecosystem?

• a sunny day

• a rain storm

• a forest fire

• an oil spill

Changes in Ecosystems

Why would algae grow in a lake?

• because the lake is polluted

• because the lake is a newly created ecosystem

• because there are a lot of fish in the lake

• because a natural disaster destroyed the lake

Changes in Ecosystems

What is the purpose of succession?

• to put an end to the creation of new ecosystems

• to form a complete ecosystem

• to have ecosystem that last no longer than 2 years

• to eliminate the need for conservation

What is it called when changes occur in an ecosystem that already exists?

• primary succession

• secondary succession

• conservation

• pollution

In what ways can humans change an ecosystem?

• by making a region flood

• by creating hurricanes

• by adding to the amount of pollution in an ecosystem

• by enjoying nature

What needs to be balanced in order for an ecosystem to thrive?

• algae and hurricanes

• pollution and conservation

• primary succession and secondary succession

• humans and nature