Why is the Ocean salty?

How many named oceans are there?

• 5

• 4

• 3

• 2

True or False: Humans can drink ocean water.

• True

• False

What do rivers and rainwater carry into the oceans?

• Minerals

• Dirt

• Leaves

• Rocks

The sun heats the earth, causing ___.

• Salt to evaporate.

• Water to evaporate.

• Minerals to evaporate.

• Seaweed to evaporate.

What does erode mean?

• To slowly wear away because of water or some other natural force.

• To build up minerals.

• The process of sand moving in the ocean.

True or False: The ocean has not gotten much saltier in millions of years.

• True

• False

What does 'dissolve' mean?

• to become part of liquid like water

• to become part of solid like ice cube

• to become part of gas like vapor

What does 'evaporate' mean?

• To change from a liquid into a gas

• To change from a solid into a liquid

• To change from a liquid into a solid

What is 'mineral' ?

• a substance naturally formed in the ground that is neither plants nor animals

• a substance naturally formed in the water that is plant

• a substance naturally formed in the water that is actually animal

What does 'runoff' mean?

• water and the substance dissolved from land into the ocean

• plants that are dissolved from land into the ocean

• dirt that is dissolved from land into the ocean