Producers are important because they

use energy from the sun to make their own food and are the base of energy pyramids

create homes for birds and squirrels

What is the role of decomposers

They break down dead organisms and return their nutrients back to the ecosystem.

Organisms that get their energy from eating other organisms.

organisms that help break down dead material

organisms that create energy from the sun

organisms that live in the ocean

Which is an example of competition

Two hermit crabs fighting over a shell

A chicken running away from a fox

All of the following are TRUE except:

Non-living things cannot affect living things in an environment.

The environment contains all the materials and energy needed for living organisms to carry out their life activities.

Living things and their environment affect each other.

Ecology examines how everything is connected.

What would happen to a population of rabbits if their natural predators were removed from their habitat?

The population of rabbits would increase at first. But then the population may become so great that there isn’t enough food for all of them and many will starve to death.

The population of rabbits would decrease at first. But then the population may become so low that there will be enough food for all of them and many will thrive.

Non Living things in an ecosystem

An organism that gets its food from other organisms

An organism that get its nutrients from the sun

An organism that gets its food from other organisms

Non living things in an ecosystem

An organism that gets its nutrients from sunlight

An animal that hunts other animals

A model showing how energy moves through food

An organism that decomposes organic material

An animal that is hunted by another animal for food

An organism that lives in or on another organism

A organism that uses energy from the sun to create its own food

An organism that decomposes organic material

An organism that uses energy from the sun to create its own food

An organism that feeds on other organisms

An organism that decomposes organic material

An organism that feeds on other organisms

An organism that gets its food from sunlight

An organism that decomposes organic material

An organism that decomposes organic material (example: mushroom)

An organism that gets its food from sunlight

An organism that gets its food from other organisms

Define: energy pyramid

A model showing how energy moves through a food chain

The cycle of how organisms feed

A model of animals from strongest to weakest

An organism that lives on or in another organism

An organism that is being hunted

An organism that hunts for food

An organism that has another smaller organism living on it

An organism that feed on plants

An organism that feeds on plants and meat

An organism that gets its food from sunlight

An organism that feeds on plants and meat

An organism that feed on plants

An organism that gets its food from sunlight

An organism that feeds on plants and meat

An organism that feed on plants

An organism that gets its food from sunlight

Select ALL correct answers... Which of the following show correct food chains?

grass ---> grasshopper ---> snake ---> hawk

hawk ---> snake ---> grasshopper ----> grass

As you increase in trophic levels

Only 10% of the energy is passed on

Why are decomposers an essential part of any ecosystem?

They recycle nutrients back into the food web

They are the most efficient producers

Without them primary consumers population would drastically increase

Grade 7: Ecosystems Review

Authored by Megan Duff

Science

7th Grade

NGSS covered

Used 171+ times

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42 questions

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MULTIPLE CHOICE QUESTION

15 mins • 1 pt

When both organisms in a symbiotic relationship benefit...

Parasitism

Mutualism

Symbiosis

Commensalism

Tags

NGSS.MS-LS2-2

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

The organism that is harmed by the parasite is called..

Host

Guest

Sad

Parasite

Tags

NGSS.MS-LS2-4

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

A symbiotic relationship where one organism benefits. The other does not benefit but is not harmed.

Parasitism

Symbiosis

Commensalism

Mutualism

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Multiple members of the same species in a particular area

Organism

Population

Community

Ecosystem

Tags

NGSS.MS-LS4-4

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Gradual change over time in a population...

Mutation

Natural Selection

Evolution

Charles Darwin

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

All the populations in a given area

Organism

Ecosystem

Population

Community

Tags

NGSS.MS-LS2-4

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

All the populations in an area in addition to the nonliving components of that area

Population

Ecosystem

Community

Ecology

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

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Grade 7: Ecosystems Review

When both organisms in a symbiotic relationship benefit...

The organism that is harmed by the parasite is called..

A symbiotic relationship where one organism benefits. The other does not benefit but is not harmed.

Multiple members of the same species in a particular area

Gradual change over time in a population...

All the populations in a given area

All the populations in an area in addition to the nonliving components of that area

Many organisms of the same species living in the same area.

One living thing. Ex. One frog, one tree, one rabbit

All of the living and non-living parts of the environment in the same area.

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