Intro the Hydrosphere

True or False:

The Earth is made up of about 70% water and 30% land.

• True

• False

Of all the water on Earth, how much of it is fresh water?

• 5%

• 3%

• 50%

• 30%

Of all the freshwater on Earth, how much of it is usable for humans and other life forms?

• 90%

• 45%

• 10%

• 1%

True or False:

A polar molecule attracts like a magnet.

• True

• False

Polarity causes which of the following?

(More than 1 answer)

• Cohesion

• Adhesion

• Capillary action

• Photosynthesis

True or False:

Water has a low heat capacity.

• True

• False

What do aquatic animals need in the water for food?

• Fish

• Shrimp

• Dissolved gasses

• Plankton

What lowers the freezing point for water?

• Barium

• Sodium

• Helium

• Oxygen