Planet Earth & Water

What is the chemical formula for water?

• CH₂

• H₂0

• W₁T₂R

• NO₂

Water is made up of atoms.

• True

• False

Water can be found in the form of:

• A solid (ice)

• A liquid (water)

• A gas (water vapor)

• All of These

What percentage of the Earth's surface is covered in water?

• 10%

• 25%

• 50%

• 70%

Where is most of the water on Earth (about 97%)?

• Rivers & Lakes

• Glaciers & Ice Caps

• Oceans

Most of the water on Earth is safe for humans to drink.

• True

• False

Why can't we drink ocean water?

• It contains too many sea creatures.

• It contains too much salt.

• It doesn't have any vitamins.

• It's too cold.

The layer (or sphere) that contains all of Earth's water is called:

• Atmosphere

• Hydrosphere

• Lithosphere

• Biosphere

About 70% of our body is made up of water.

• True

• False

Millions of people in the world lack access to clean drinking water.

• True

• False