ocean currents

What affects the density of water?

• Salt

• Temperature

• The seasons of the year

• Both A and B

Two types of ocean currents are

• local and global
• sea and land
• surface and deep
• warm and cold

Currents that occur at or near the surface of the ocean are called 

• Deep Currents
• Convection Currents
• Surface Currents
• Wave Currents

Surface currents are mainly caused by

• The Coriolis Effect
• Cold and Warm Water
• Convection
• Wind

Regular movements of water far below the oceans surface are called

• Warm Currents
• Deep Currents
• Shallow Currents
• Surface Currents

What causes ocean currents in the Northern Hemisphere to curve to the right?

• Earth's orbit around the Sun
• Earth's spinning on its axis
• Earth's magnetic field
• Earth's force of gravity

What causes vertical ocean currents?

• The phase of the moon.
• The gravitational attraction of the sun
• Commercial boating activities.
• The temperature and salinity of ocean water

Where is ocean water the densest.

• The surface
• The middle
• The bottom
• Lake Michigan

As you go deeper in the ocean, the water is colder and less salty.

• True
• False

Warm ocean currents generally come from

• The North Pole
• The South Pole
• The Equator
• Both A and B