Changes in Ecosystem

Which of the following might result from the process of natural eutrophication?

• A pond becomes a meadow.

• A rock breaks down into soil.

• A glacier retreats to expose new land.

• A non-native species takes resources from native species.

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-3

What does biodiversity indicate about an ecosystem?

• the location of the ecosystem

• the overall size of the ecosystem

• the ability of the ecosystem to survive change

• the identity of the organisms that began ecological succession in the ecosystem

Tags

NGSS.MS-LS2-2

The picture shows a land ecosystem that experiences annual flooding. What type of succession is most likely happening?

• primary succession

• pioneer succession

• keystone succession

• secondary succession

How can you tell from the diagram that this is secondary succession rather than primary succession?

• It begins with bare rock.

• There are large trees.

• There are grasses and shrubs.

• It begins with soil.

Which term best describes the number and variety of organisms in a given area during a specific period of time?

• carrying capacity

• biodiversity

• succession

• eutrophication

Tags

NGSS.MS-LS2-5

What might happen to the rest of the food chain if there was a decrease in the snake population?

• The grasshopper population will increase.

• The mouse population will decrease.

• The hawk population will decrease.

• The grass population will decrease.

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-2

NGSS.MS-LS2-1

After this prairie was flooded, all the animals left and the grasses died. Which organism will most likely return first?

• jackrabbit

• hawk

• coyote

• grasses

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

Which change would most likely cause all living things in an ecosystem to perish or move away?

• a flood on the plains

• fire in a forest

• a tornado on the plains

• a landslide down a mountain

Tags

NGSS.MS-LS2-4

NGSS.MS-ESS3-2

Which change would least likely cause plants in an ecosystem to perish?

• an earthquake on a grassland

• a hurricane along a beach

• a fire in a forest

• a flood in a valley

Tags

NGSS.MS-LS2-4

NGSS.MS-LS1-5

What would happen to this food chain if there was no grass?

• The grasshoppers would eat the mice, and the snakes would move away.

• The mice would have more grasshoppers to eat.

• The snake population would increase.

• The grasshopper population would decrease.

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-2

NGSS.MS-LS2-1

NGSS.MS-LS2-3