Inside Level A Unit 3 Selection 1

Front

What is a layer?

Back

A section that is on top or under another.

Front

What does it mean to force something?

Back

To push.

Front

What happens when there is too much weight on ice?

Back

It forces the ice loose.

Front

What is the surface of a lake like when there is no wind?

Back

The surface of the lake is calm.

Front

What does it mean to erupt?

Back

To break open or shoot out suddenly.

Front

What is a volcano?

Back

A mountain that can erupt with lava, ash, and gases.

Front

What is the definition of surface?

Back

The outermost layer or top part of something.

Front

What does it mean to pull?

Back

To exert force on something to move it toward oneself.

Front

What is an example of a force?

Back

Gravity pulling an object down.

Front

What is the meaning of warning?

Back

A sign or indication that something may happen.