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B. Life Systems · Habitats and Communities

Habitats and Communities: Unit Review

B1.1 B1.2 B2.1 B2.2 B2.3 B2.4 B2.5 B2.6 B2.7 A1.1 A1.2 A1.3 A1.4 A1.5 A2.1 A2.2 A3.1 A3.2 A3.3About 40 minutes
Learning goals
  • I can describe habitats and communities and how organisms interact in them.
  • I can build food chains and read food webs.
  • I can explain structural adaptations and why habitats have limits.
  • I can weigh human impacts on habitats and describe ways to protect species.

Words to know

habitat
The place where an organism lives and gets everything it needs.
community
All the interacting species that share a habitat.
producer / consumer / decomposer
Makes its own food / eats other organisms / breaks down dead things.
food web
Many food chains in a community, connected.
structural adaptation
A body feature that helps an organism survive in its habitat.
carrying capacity
The largest population a habitat can support over time.
extinct
Gone from everywhere on Earth, forever.

Let's review!

In this unit you explored habitats and communities. You learned what a habitat provides, how species in a community interact, what helps or harms a community, how animals are sorted by diet, how energy moves through food chains and food webs, how structural adaptations help plants and animals survive, why every habitat has limits, how people affect habitats, and what happens when a species disappears. You also worked as a scientist, an engineer and a coder.

This review has a few questions from every lesson. Try each one, then press Show answer to check.

Sungrassproducerrabbitconsumerfoxconsumerdecomposersfungi, bacteria, wormswhen they dienutrients
Quick recap: energy starts with the Sun, passes to a producer and then to consumers. Decomposers return nutrients to the soil for plants.
Structural (a body part)Behavioural (an action)a beaver's strong teetha goose's waterproof feathersa snowshoe hare's big feeta beaver building a damgeese flying southblue jays burying acorns
Quick recap: ask "Is it a body part, or something the animal does?" This unit focused on structural adaptations.

Habitats: Places That Provide the Necessities of Life

1

What is a habitat?

2

Name four necessities of life.

3

How does a pond give a beaver shelter?

4

What is a microhabitat? Give an example.

Communities: Species That Share a Habitat

1

All the painted turtles in a lake: population or community?

2

What is a community?

3

Two squirrels want the same acorns. What kind of interaction is this?

4

How do a bee and a flower help each other?

What Helps or Harms a Community?

1

Name one non-living, one living and one human factor that can affect a pond community.

2

What is an invasive species? Name one in Ontario.

3

Zoe tests pill bugs: damp side in the dark, dry side in the light. What is wrong?

Herbivores, Carnivores and Omnivores

1

Sort: moose, lynx, raccoon.

2

What do flat molars tell you about an animal's diet?

3

In the sorting program, what is the output for an animal that eats plants and animals?

Food Chains: Producers, Consumers and Decomposers

1

Put in order with arrows: hawk, grass, frog, grasshopper, snake.

2

Classify: algae, perch, mushroom.

3

Where does the energy in a food chain come from?

4

Why are decomposers important?

Food Webs: Food Chains Connected

1

What is a food web?

2

In the meadow web, what does the owl eat?

3

In the meadow web, if the mice disappeared, which animals would lose a food?

Structural Adaptations of Animals

1

Name one structural adaptation of a snowshoe hare and how it helps.

2

Is hibernating a structural or behavioural adaptation?

3

How do a beaver's teeth fit its habitat?

Structural Adaptations of Plants

1

How do waxy needles help a pine tree?

2

Why does a pitcher plant trap insects?

3

What invention did burdock burrs inspire?

Why Every Habitat Has Limits

1

Why does every habitat have limits?

2

What happens when a population grows too big for its habitat?

3

A program starts with 3 rabbits, doubles each year and has a limit of 20. List years 0 to 4.

People and Habitats: Weighing the Impacts

1

Give one harmful and one helpful human impact on habitats.

2

What is a perspective?

3

What does Two-Eyed Seeing mean?

4

Name one technology that helps protect wildlife.

When a Species Disappears: Depletion and Extinction

1

What is the difference between extirpated and extinct?

2

Name one species that came back in Ontario because of people's help.

3

Why might losing pollinators affect birds and bears?

Just for fun

Q: What did the food web say to the food chain?

A: "You're great, but I've got way more connections!"

How to use this review

Do one or two sections at a time. Say your answer out loud or write it down before you press Show answer. If you miss more than one question in a section, go back to that lesson and do its practice again. Then try the quiz at the end.

Check your understanding

Quiz

1.

Which of these is a habitat?

2.

All the different species living and interacting in a pond make up a...

3.

Which is an invasive species in Ontario?

4.

A black bear eats berries, nuts, insects and fish. It is a...

5.

Which food chain is correct?

6.

Mushrooms and bacteria are...

7.

A food web is...

8.

Which is a structural adaptation?

9.

A habitat can only support a certain number of animals because...

10.

A species gone from everywhere on Earth is...

For parents and teachers

Use the review to find which ideas need more practice.

Which lesson to revisit:

  • Mixes up habitat and shelter, or forgets a necessity of life → Habitats: Places That Provide the Necessities of Life.
  • Confuses population and community → Communities: Species That Share a Habitat.
  • Unsure about factors, invasive species or fair tests → What Helps or Harms a Community?
  • Sorts animals by diet incorrectly → Herbivores, Carnivores and Omnivores.
  • Draws food chain arrows backward or mislabels producers/consumers/decomposers → Food Chains.
  • Cannot find chains in a web or predict changes → Food Webs.
  • Mixes up structural and behavioural adaptations → Structural Adaptations of Animals and of Plants.
  • Thinks populations can grow forever → Why Every Habitat Has Limits.
  • Sees only one side of a land-use decision → People and Habitats: Weighing the Impacts.
  • Mixes up extirpated and extinct → When a Species Disappears.