T1L3-T2L2

Front

What is a pond?

Back

A pond is a small body of still water, smaller than a lake, often shallow enough for sunlight to reach the bottom.

Front

What is a lake?

Back

A lake is a larger body of water surrounded by land, often deeper than a pond.

Front

What is an ocean?

Back

An ocean is a vast body of salt water that covers most of the Earth's surface.

Front

What is a river?

Back

A river is a large, flowing body of water that usually empties into an ocean, lake, or another river.

Front

What is the thermosphere?

Back

The thermosphere is the layer of the atmosphere that reaches the highest temperatures, located above the mesosphere.

Front

What is the troposphere?

Back

The troposphere is the lowest layer of the atmosphere, where most weather occurs and where air pressure is highest.

Front

What is the stratosphere?

Back

The stratosphere is the layer of the atmosphere above the troposphere, containing the ozone layer.

Front

What is the exosphere?

Back

The exosphere is the outermost layer of the atmosphere, where air is very thin and satellites orbit.

Front

What is ozone (O3)?

Back

Ozone is a gas composed of three oxygen atoms, found in the stratosphere, that protects Earth from harmful UV rays.

Front

What does the prefix 'thermo-' mean?

Back

The prefix 'thermo-' means heat.