1.7 How Do Ecosystems Change?

Natural changes ________ to the environment.

• often happen

• rarely happen

• never happen

• do not affect

Tags

NGSS.MS-LS2-4

_________ is a type of disturbance.

• A fire

• A flood

• A farmer

• All of the above

__________________ are very long-lived plants that rule the forest.

• Pioneer organisms

• Climax organisms

• Disturbance organisms

• Intermediate organisms

Which of the following would cause a very slow change to the ecosystem?

• A volcano erupting

• A flood washing away soil

• People cutting down trees

• A drought causing a dust storm

Tags

NGSS.MS-LS2-4

NGSS.MS-ESS3-4

During a succession,

• a few small organisms are replaced by a few big organisms.

• a few small organisms are replaced by a lot of big organisms.

• a lot of small organisms are replaced by a few big organisms.

• a lot of small organisms are replaced by a lot of big organisms.

Tags

NGSS.MS-LS2-4

How do plants prepare for winter?

• dormancy

• migration

• hibernation

• collecting food

A disturbance

• changes the environment for a short period of time.

• changes the environment for a long period of time.

• is a slow process of organisms replacing each other.

• is a quick process of organisms replacing each other.

What is the role of pioneer organisms?

• create a disturbance

• slowly form new soil

• support animals needs

• save energy for a plant

Tags

NGSS.MS-LS2-4

Changes to the climate cause

• plant cycles to change.

• animals move to new areas.

• disruption to food chains.

• all of the above.

Tags

NGSS.MS-LS2-4

NGSS.MS-ESS3-4

________ is when animals move in a cycle to fit their needs.

• Hibernation

• Dormancy

• Migration

• Collecting food