B. Life Systems · Growth and Changes in Animals

Adaptations: How Animals Survive Where They Live

B2.5 A1.2 A1.5About 40 minutes

Learning goals

I can explain what an adaptation is.
I can give examples of physical adaptations (body parts) and behavioural adaptations (actions) of Canadian animals.
I can do an experiment to test how fat (blubber) keeps animals warm.

Words to know

adaptation
A body part or a behaviour that helps an animal survive in its habitat.

physical adaptation
A body part or body feature that helps an animal survive, like thick fur or sharp claws.

behavioural adaptation
Something an animal does that helps it survive, like migrating or storing food.

camouflage
Colours or patterns that help an animal blend in with its surroundings so it is hard to see.

predator
An animal that hunts and eats other animals.

prey
An animal that is hunted and eaten by other animals.

blubber
A thick layer of fat under the skin that keeps animals like seals and whales warm.

How does a polar bear stay warm?

In the Arctic, winter temperatures can drop far below zero. A polar bear walks on sea ice and swims in icy water. You would freeze! How does the polar bear survive?

Its body has special features that help it live there. These are called adaptations.

A polar bear with thick white fur walking on sea ice beside cold, dark water. — Notice the polar bear's thick fur and wide, furry paws. These adaptations help it stay warm and walk on ice. AI-generated image

Remember from Grade 1

In Grade 1 you learned that some animals migrate, hibernate or change their coats when the seasons change. Those are all adaptations!

An adaptation is a body part or a behaviour that helps an animal survive in its habitat: to get food, stay safe, stay warm or cool, and raise young.

There are two kinds:

Physical adaptations: body parts and features (what an animal has).
Behavioural adaptations: actions (what an animal does).

Animal	Physical adaptation	How it helps
🐻‍❄️ polar bear	thick fur and a thick layer of fat; fur on the bottoms of its paws	keeps it warm; grips the slippery ice
🦫 beaver	big orange front teeth that never stop growing; flat tail; webbed back feet	cuts down trees; steers when swimming and slaps the water to warn others; swims well
🐇 snowshoe hare	white winter fur; big furry back feet	camouflage in the snow; runs on top of deep snow
🦔 porcupine	sharp quills	protects it from predators. (Porcupines cannot shoot their quills, but quills come off easily when touched.)
🦉 great horned owl	big eyes; soft-edged feathers	sees in dim light; flies almost silently to catch prey
🪶 great blue heron	long legs and a long, sharp beak	wades in water and spears fish
🦌 caribou	wide hooves	walks on snow and digs through it to find lichen to eat

Physical adaptations: what the animal has

A polar bear's warm layers: thick fur outside and a thick layer of fat underneath keep body heat in. Fur on its paws grips slippery ice.

Animal	Behavioural adaptation	How it helps
🪿 Canada goose	migrates south in fall (some stay in cities)	finds food and open water in winter
🦋 monarch	migrates to Mexico	survives the winter in a warmer place
🐿️ groundhog	hibernates all winter in its burrow	saves energy when there is little food
🐿️ red squirrel	stores spruce and pine cones in big piles	has food all winter
🦫 beaver	stores branches underwater near its lodge	eats them in winter under the ice
🦨 striped skunk	stamps its feet and raises its tail as a warning, then sprays	scares predators away

Behavioural adaptations: what the animal does

Camouflage

Camouflage helps an animal hide. A white snowshoe hare is hard for a lynx to see in the snow. A brown female mallard duck is hard to see on her nest. A green frog sits still among green plants. Camouflage helps both prey (to hide) and predators (to sneak up).

Worked example

Let's find a beaver's adaptations

A beaver lives in ponds and streams. Find its physical and behavioural adaptations.

Teeth (physical): big, strong front teeth cut trees. Chewing wood wears them down, but they never stop growing, so they never get too short.
Tail (physical): a flat tail steers when it swims and slaps the water to warn other beavers of danger.
Feet (physical): webbed back feet push water like paddles.
Under water (physical): it can close its ears and nose, and it has clear eyelids like swimming goggles.
Building (behavioural): it builds dams and a lodge with an underwater door, so predators cannot get in easily.
Storing food (behavioural): in fall it sinks branches near the lodge to eat all winter.

Teeth, tail, webbed feet and closable ears and nose are physical adaptations. Building dams and lodges and storing food are behavioural adaptations.

Inside a beaver lodge. The underwater door keeps predators out, the room stays dry above the water, and branches stored under water are winter food under the ice.

Worked example

Let's test: does fat keep you warm? (the blubber glove)

Seals, walruses and belugas have blubber. Does a layer of fat really keep a body warm in icy water?

Question: Will a hand with a fat layer feel cold more slowly in ice water?
Make the glove: Fill a zip-top bag with vegetable shortening (a kind of fat). Put a second zip-top bag inside it and spread the shortening evenly around it. Now you have a "blubber glove".
Fair test: Use one bag with shortening and one empty bag of the same kind. Same bowl of ice water. Change only the fat.
Predict: I think the blubber hand will stay warm longer.
Test: Put one hand in each bag and dip them in the ice water together. Count the seconds until each hand feels cold. Take your hands out by 30 seconds.
Record your results and compare.

The hand in the blubber bag stays warm much longer. Fat keeps heat in. That is why blubber is an adaptation for animals in icy water.

Funny but true

Beavers never worry about having white teeth. Their front teeth are orange on purpose! They have iron in them, which helps make them strong for chewing trees.

Hands-on activity

Blubber glove experiment

You need: vegetable shortening (about 1 cup), 4 large zip-top freezer bags, a big bowl of ice water, a timer, and a grown-up.

Follow the steps in the example to make one blubber glove and one empty glove.
Predict which hand will feel cold first.
Put your hands in and count. Take your hands out by 30 seconds, or sooner if it hurts.
Record: "My blubber hand felt cold after ___ seconds. My other hand felt cold after ___ seconds."
Share: Tell your family what you found and which Canadian animals have blubber (seals, walruses, belugas). Polar bears have a thick fat layer too.

Safety: Do not eat the shortening. Wipe up spills so no one slips. Wash and dry your hands after.

What to look for: a fair test (only the fat changed), a recorded result, and the idea that fat keeps heat in.

Your turn

What is an adaptation?

Is a porcupine's quills a physical or a behavioural adaptation?

Is a goose flying south a physical or a behavioural adaptation?

How does white winter fur help a snowshoe hare?

Why does a beaver store branches underwater in the fall?

Name 2 adaptations that help a polar bear live in the Arctic.

What is camouflage?

More practice: warm-up

Does an adaptation help an animal survive?

What does a groundhog do in winter?

What do beavers use their big front teeth for?

Which animal uses a bad-smelling spray to protect itself?

What is a predator?

More practice: on your own

Sort into physical or behavioural: owl's big eyes, red squirrel storing cones, heron's long legs, monarch migrating.

How do a caribou's wide hooves help it?

Why does a skunk stamp its feet and raise its tail before spraying?

In the blubber glove test, why do we use an empty bag on the other hand?

How does a great blue heron's body help it catch food?

Challenge

A snowshoe hare turns white in winter. What problem would a white hare have if there were no snow one winter?

Invent a new Canadian animal that lives in a cold lake. Describe 1 physical and 1 behavioural adaptation it would need.

Explain why the blubber glove result helps us understand belugas in Arctic water.

Check your understanding

Quiz

What is an adaptation?

Which is a behavioural adaptation?

Which is a physical adaptation?

A white hare in the snow is an example of...

What did the blubber glove test show?

Why does a beaver slap its tail on the water?

For parents and teachers

Big idea: Adaptations are physical characteristics (body parts and features) and behaviours that help an animal survive in its natural environment (B2.5). In Grade 1 your child met seasonal adaptations (migration, hibernation, coat changes); now they sort adaptations into physical and behavioural and connect them to habitat.

Experiment (A1.2): The blubber glove is a classic fair test. Keep ice-water time short (30 seconds maximum).

Accuracy notes: Porcupines cannot throw quills. Black bears spend the winter in a den but are often described as a lighter kind of hibernator; groundhogs are true hibernators. Not all Canada geese migrate.

Common difficulties:

Thinking an animal adapts on purpose in its lifetime ("the hare decided to grow white fur"). Explain simply: these are features the kind of animal already has.
Mixing up physical and behavioural. Ask, "Is it something it has or something it does?"

How to help: On walks, ask "How does that animal's body help it live here?" for squirrels, ducks and birds.