7th Grade Science Unit Test: Ecosystems

Abiotic factors include living components of an ecosystem.

• True

• False

Mutualism is a type of interaction where both species benefit.

• True

• False

Tags

NGSS.MS-LS2-2

An invasive species helps maintain the balance of a native ecosystem.

• True

• False

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-5

Population density is the number of individuals per unit area.

• True

• False

A biome is smaller than a habitat and has fewer types of organisms.

• True

• False

Predation involves one organism eating another.

• True

• False

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-3

A pioneer species is usually one of the last species to colonize an area.

• True

• False

The health of an ecosystem can be measured by biodiversity and species interactions.

• True

• False

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-5

Which of the following is a biotic factor?

• Temperature

• Sunlight

• Soil bacteria

• Water

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-4

Which is an example of commensalism?

• Bees pollinating flowers

• Barnacles attaching to a whale

• A flea feeding on a dog

• Lions hunting antelope

Tags

NGSS.MS-LS2-2