Polar Bears and the Arctic

People in the Arctic _____ inside their homes.

• A. stored grains

• B. kept their sleds

• C. used oil lamps

• D. trained animals

Sled dogs helped their owners by

• A. leading them when there was little light.

• B. defending them if animals got too close.

• C. eating ice when there wasn't much water.

• D. digging for mice and rats that destroyed crops.

Many modern native people

• A. give tours of their areas.

• B. drive snowmobiles and cars.

• C. enjoy flower and food gardens.

• D. are afraid to travel very far.

Water in the Arctic tundra can't drain because

• A. the land is frozen.

• B. there is clay in the soil.

• C. there are no valleys.

• D. the trees absorb it all

When they are about thirty months old, polar bear cubs

• A. get their back teeth.

• B. leave their mothers.

• C. have their first cubs.

• D. grow their adult claws

Polar bears are in danger because

• A. more people are moving into their areas.

• B. global warming is causing the sea ice to melt.

• C. overfishing is taking away some of their food.

• D. there aren't enough seals for them to eat.

Seals use less oxygen underwater because

• A. their heartbeats slow down.

• B. their mouths stay closed.

• C. they are moving quickly.

• D. oxygen enters through their gills.

A lemming will _____ if its food runs out.

• A. cut down on its energy use

• B. live on water and ice

• C. steal a polar bear's food

• D. move to a new place

Hibernating helps animals by

• A. making them healthy.

• B. toning their bodies.

• C. resting their joints.

• D. saving their energy

The Arctic is dry because

• A. it is too cold for any bodies of water to thaw.

• B. the thin air soaks up most of the moisture.

• C. cold air doesn't trap as much moisture as warm air.

• D. the long periods of sunlight help dry out the land.