Ecosystems
Food Chains and Food Webs
Energy and Matter
Species and Habitats
Decomposers
100

This term describes these parts of an ecosystem, such as sun, soil, water, and air.

What are non-living things? 

100

Name the three essential parts of every food chain.

What are producers, consumers, and decomposers?

100

Producers are always located at this position in an energy pyramid.

What is the bottom?

100


When organisms fight for resources like space and food, the numbers of one organism will ___.

What is decrease?

100

What is the main purpose of decomposers?

What is to break down dead organisms? 

200

Name two living things that could be found in an ecosystem.

What are [any two: lizards, frogs, lily pads, tulips, plants, animals, etc.]?

200

A living thing that makes its own food is called a ___.

What is a producer?

200

An energy pyramid shows how energy passes from one organism to another as they are ___.

What is consumed?

200


A non-native species that takes over an ecosystem quickly and pushes out native species is called a(n) ___.

What is an invasive species?

200

Would dead flowers decompose faster with or without a decomposer?

What is with a decomposer?

300

If an animal needs a large amount of space and its habitat is destroyed, what would happen to that animal?

What is: the animal would disappear from the habitat?

300

This diagram shows what food organisms eat.


What is a food web?

300

How does matter move between organisms in a food chain?

What is: matter moves from one organism to another when it is eaten?

300

Species that have lived in an environment for many, many years are called ___.

What are native species?

300

If no more dead flowers were added to a pile that mushrooms were eating, what would eventually happen to the mushrooms?

What is the mushrooms would die out / starve?

400


Elephants break tree limbs and push down whole trees. Which organisms would be most affected by this?

What are birds or other animals that use trees for shelter or food?

400

In a food chain diagram, arrows point to where the energy is going. True or False?

What is True?

400


Plants take in _____ from animals, which animals release as a gas that plants need to live.

What is carbon dioxide?

400

Name two ways that invasive and native species differ in their survival.

What is: they don't have the same predators / they don't grow and reproduce at the same rate?

400

Name one example of a decomposer.  

What is a mushroom?

500

Why would the deep ocean NOT have plants growing there?

What is: the lack of sun in the deep ocean prevents plants from growing?

500

Explain the relationship between a producer and a consumer in a food chain.

What is: a producer makes its own food, and a consumer eats the producer (or other organisms) to get energy?

500

Using the example from the study guide, explain how matter moves from dead flowers to a mushroom.

What is: the dead flowers are eaten by the mushroom, and the energy is moved from the dead flowers to the mushroom?

500

Explain why invasive species are able to take over an ecosystem and push out native species.

What is: invasive species don't have the same predators, grow and reproduce at different rates, and fight for the same resources as native species?

500

Describe what would happen to an ecosystem if decomposers were completely removed.

What is: dead organisms would not break down, matter would not cycle back into the environment, and the ecosystem would become unhealthy?

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