Survival at 40 Below

On page 470, what causes ice to form on the pond?

• Nights grow shorter.

• Nights grow colder.

• Days grow longer.

• Nights grow warmer.

On page 472, why is the Arctic ground squirrel plump?

• The squirrel builds tunnels into the earth.

• The days grow shorter.

• Because he felt like it.

• He ate tundra plants and seeds during summer.

Which word means almost the same as adaptation?

• need

• description

• change

• benefit

Which word has the OPPOSITE meaning of the word dormant?

• awake

• messy

• sleepy

• worthless

What is the main idea of the selection?

• Animals can survive easily at low temperatures.

• In the Gates of the Arctic National Park, all animals hibernate during the winter.

• Some animals are well adapted to survive the colder air temperatures above the ice and snow.

• Many animals have characteristics that help them survive the winter in the Gates of the Arctic National Park.

What keeps a wood frog alive when it stops breathing and its heart stops beating?

• sugar

• glucose

• A thin layer of ice

• antifreeze substances

What happens when a squirrel supercools its body?

• It wakes up.

• It sleeps soundly for the winter

• Its heart rate drops to three beats per minute.

• Its temperature falls to the freezing point of water.

Why does the ptarmigan dive into the snow drifts at night?

• The snow provides warmth so it can survive the lethal temperatures during the night.

• The snow provides coolness so it can survive the lethal temperatures during the night.

• The snow provides shelter from prey.

• The snow provided shelter from humans.

The word agile means able to move and react

• quickly and easily

• slowly and deliberately

• immediately and on time.

• carefully and delicately.

Which of the following would hibernate?

• a school

• a person

• an animal

• an imagination