Lesson 3: Changes in Ecosystems

1.

Multiple Choice

1 min

1 pt

Some damaged ecosystems can recover after a disturbance. Is this statement true or false?

True

False

2.

Multiple Choice

1 min

1 pt

Ecosystems only change slowly after a natural disturbances. Is this statement true or false?

true

false

3.

Multiple Choice

1 min

1 pt

Changes in ecosystems proceed in a fairly predictable way after a disturbance occurs. Is this statement true or false?

True

False

4.

Multiple Choice

1 min

1 pt

Which type of succession could successfully occur without pioneer species?

Primary succession

Secondary succession

5.

Multiple Choice

1 min

1 pt

How are primary succession and secondary succession similar?

Both require pioneer species

Both occur ONLY after natural disasters

Both are a series of changes in an ecosystem

6.

Multiple Choice

1 min

1 pt

How is biodiversity beneficial to an ecosystem?

It is actually not beneficial to an ecosystem

It makes the community unstable.

Biodiversity helps communities remain stable.

7.

Multiple Choice

1 min

1 pt

_______________ are the first organisms to live in an uninhabited area.

Climax Community

Pioneer Species

Organisms

8.

Multiple Choice

1 min

1 pt

____________________ is the number and variety of species that are present in an area.

Secondary succession

Primary succession

Biodiversity

Ecosystems

9.

Multiple Choice

1 min

1 pt

When a community starts to grow in an area that has no soil, this is known as ____________ succession.

Secondary

Primary

10.

Multiple Choice

1 min

1 pt

When an area has been disturbed but still has soil it is called ______________ succession.

Primary

Secondary

11.

Multiple Choice

1 min

1 pt

__________________ is the process in which organic matter and nutrients slowly build up in a body of water. This organic matter can eventually fill the pond and become soil.

Biodiversity

Eutrophication

Ecosystem

Pioneer species

12.

Multiple Choice

1 min

1 pt

The slow development or replacement of an ecological community by another ecological community over time is called ______________________.

Succession

Biodiversity

Development

Climax species

13.

Multiple Choice

1 min

1 pt

Mature ecosystems are dominated by a community of what?

Pioneer Species

Climax species

Biodiversity

The same species

14.

Multiple Choice

1 min

1 pt

All of the following are examples of sudden ecosystem change EXCEPT ____________________.

Hurricane

Seed sprouting

Forest fire

Volcano

15.

Multiple Choice

1 min

1 pt

All of the following are examples of slow ecosystem changes EXCEPT_______________________.

Eutrophication

Organisms die

Tornado

Climate change

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