Ice Ages

I'm going to be a mother soon. Who am I?

• Manny

• Buck

• Ellie

• Sid

I'm going to be a father, soon. What's my name?

• Manny

• Ellie

• Diego

• Sid

I'm a weasel. I like fighting. Who am I?

• Eddie

• Manny

• Ellie

• Buck

We are possums. We like playing games. Who are we?

• Crash and Eddie

• Sid and Diego

• Ellie and Manny

• Dinosaurs

Throughout the Earth's history, there have been long periods of time when glaciers and ice sheets cover large parts of the Earth. What are these periods called?

• dark ages

• ice ages

• cold ages

• winter ages

The text describes and compares the glacial periods and interglacial periods of an ice age. What is one way these periods are different?

• The average global temperature is lower during an interglacial period than a glacial one.

• The average global temperature is higher during an interglacial period than a glacial one.

• Interglacial periods normally last longer than glacial periods.

• More of the Earth is covered by ice sheets during an interglacial period than a glacial one.

What is the main idea of this text?

• Today, large areas of ice cover regions of Antarctica, the Arctic, and Greenland.

• Ice ages alternate between glacial and interglacial periods as the Earth's climate changes.

• During an ice age, glacial periods generally last much longer than interglacial periods.

• One important factor that may cause ice ages is the amount of light Earth receives from the sun.

Read the following sentences from the text. "During glacial periods of an ice age, temperatures are much colder than they are today. Ice sheets and glaciers expand, covering more of the planet." Based on the text, what does the word "expand" mean?

• get bigger

• get smaller

• get warmer

• get lost

Choose the answer that best completes this sentence.

Ice ages alternate between two different periods, ______ glacial periods and interglacial periods.

• namely

• on the other hand

• for example

• meanwhile

Which of the following sentences uses the word 'glacial' correctly?

• The glacial pace of the meeting made everyone impatient.

• The glacial dessert was too sweet for my taste.

• She wore a glacial dress to the summer party.

• His glacial attitude warmed the room.