7th Grade: Spring 2025 Test

Which of the following flows through ecosystems in one direction?

• carbon

• energy

• nitrogen

• water

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

In what form is energy that is NOT used for life processes released from living things?

• light energy

• sound energy

• thermal energy

• chemical energy

Why are food webs better representations of how energy moves through an ecosystem than food chains?

• Food chains include decomposers, which do not play a role in energy movement through an ecosystem.

• Food chains show how matter moves through an ecosystem, not not energy.

• Food webs include how energy enters an ecosystem, and food chains don't.

• Food webs show that animals in an ecosystem can get energy by eating different things.

Tags

NGSS.MS-LS2-3

In the food web, what eats the squid?

• diatoms

• squid

• leopard seal

• orca

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NGSS.MS-LS2-2

NGSS.MS-LS2-3

Which describes how the atoms in living things cycle?

• through living parts of ecosystems only

• in one direction from living to nonliving parts of the ecosystem

• in one direction from nonliving to living parts of the ecosystem

• repeatedly back and forth through living and nonliving parts of the ecosystem

Tags

NGSS.MS-LS2-3

What is the source of the carbon atoms in a plant's cells?

• they were created as the plant grew

• the Sun

• water molecules

• the environment

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

The largest number of individuals of one species that an ecosystem can support over time is its biotic potential.

• True

• False

A symbiotic relationship that benefits both species is referred to as commensalism.

• True

• False

What is the difference between a community and an ecosystem?

• An ecosystem consists of living and nonliving things in an area. A community is all the members of one species in the area.

• An ecosystem consists of living and nonliving things in an area. A community is all the populations in the area.

• An ecosystem consists of nonliving things in an area. A community is all the living things in the area.

• An ecosystem consists of all the populations in an area. A community is all the nonliving things in the area.

Which of these is a limiting factor?

• food supply

• shelter

• existence of predators

• all of the above

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4