Changes in Ecosystems

Which of these populations is most likely to decrease if the number of grasshoppers decreases?

• plants

• frog

• praying mantis

• owl

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

An example of a natural change to the ecosystem is:

• highway built in the middle of the desert. 

• Lightening strikes and starts a fire in the forest. 

• rancher placing too many grazers in a small area leading to overgrazing.

6. A squirrel makes a change to its environment when it —

• climbs a tree

• digs a hole to bury an acorn

• collects acorns

• jumps from tree to tree

The removal of trees and plants can cause problems such as soil erosion. 

• True

• False

Tags

NGSS.MS-ESS2-2

NGSS.MS-LS2-4

NGSS.MS-LS2-5

What is the correct order of secondary succession?

• 1234

• 3241

• 4312

• 2134

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

What has causes this aquatic ecosystem to change into a land ecosystem?

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

What has changed from A to B?

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Where does primary succession start?

• on land with lots of trees and animals

• on land that was previously farmed

• on new land with little or no soil

• under the sea

What is the correct order for primary succession?

• ABCD

• BCDA

• DABC

• CDAB

Tags

NGSS.MS-ESS2-2

Where does secondary succession start?

• where land is new with new soil

• in areas where land has been disrupted

• in land with lots of trees and animals

• underwater