Ocean Water and Currents Foldable Quiiz

What percentage of Earth’s surface is covered by water?

• 50%

• 60%

• 71%

• 80%

Which of the following is not one of the four main oceans?

• Pacific Ocean

• Indian Ocean

• Atlantic Ocean

• Mediterranean Ocean

What is salinity?

• The movement of ocean currents

• The amount of dissolved salts in ocean water

• The temperature of ocean water

• The density of fresh water

Why is seawater denser than freshwater?

• It is colder

• It has more salt

• It contains more oxygen

• It has a higher pH level

Why do objects float more easily in seawater than in freshwater?

• Seawater is warmer

• Seawater is denser due to its salt content

• Seawater has stronger waves

• Seawater has more fish

What generally causes surface currents to move?

• Differences in temperature

• Wind blowing across the ocean’s surface

• Underwater volcanoes

• Earthquakes under the ocean floor

How do warm ocean currents typically move?

• From the poles toward the equator

• From the equator toward the poles

• In random directions

• Only in the Pacific Ocean

What happens when ocean currents hit a continent?

• They stop moving

• They change direction

• They turn into waves

• They become subsurface currents

What causes the Coriolis effect?

• The rotation of the Earth

• The gravitational pull of the moon

• The amount of salt in the ocean

• The direction of the wind

In the Northern Hemisphere, how do ocean currents typically move due to the Coriolis effect?

• In a straight line

• Clockwise

• Counterclockwise

• Back and forth