Lesson 3: Changes in Ecosystems

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

• True

• False

Tags

NGSS.HS-LS2-6

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

• true

• false

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

• True

• False

Which type of succession could successfully occur without pioneer species?

• Primary succession

• Secondary succession

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

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.

Tags

NGSS.MS-LS2-5

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

• Climax Community

• Pioneer Species

• Organisms

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

• Secondary succession

• Primary succession

• Biodiversity

• Ecosystems

Tags

NGSS.MS-LS2-5

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

• Secondary

• Primary

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

• Primary

• Secondary