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The measure of the amount of salt in water.

• Freshwater

• Saltwater

• Salinity

• Saltiness

Approximately how much of all the water on earth is saltwater?

• 3%

• 60%

• 70%

• 97%

Approximately how much of all the water on earth is available to humans for consumption?

• 1% or less

• 3%

• 70%

• 97%

MOST freshwater is located where?

• Seas and Oceans

• Oceans and Glaciers

• Glaciers and Groundwater

• Groundwater, Lakes, and Rivers

Which of the following creates surface currents?

• salinity

• temperature

• wind

• depth

What creates ocean waves?

• the gravitational pull of the moon

• temperature and salinity

• wind blowing across the surface of the water

• fish swimming through the water

what creates ocean tides?

• the gravitational pull of the moon

• temperature and salinity

• wind blowing across the surface of the water

• fish swimming through the water

What are the two types of ocean tides?

• high tide and low tide

• long tide and short tide

• big tide and small tide

• fast tide and slow tide

How does salt get into the ocean?

• It comes from glaciers.

• It comes from the rain that runs off of rocks and land into rivers.

• Someone poured it in the ocean.

• It is made from sand.

Warm water is less __________ than cold water.

• dense

• sun

• more

• temperature

• ocean currents