Unit 4 Lesson 2 Ocean Currents Review

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

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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

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Where is ocean water the densest.

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

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Two types of ocean currents are

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

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Temperature and salinity differences in ocean water cause:

• Mid-ocean ridges
• Deep Currents
• Surface Currents
• High tide and low tide

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The Gulf stream carries _____________ water from the east coast of The United States to the West coast of Europe.

• Cold
• Warm 
• Freezing
• Fresh

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

• True
• False

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Warm ocean currents generally come from

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

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What process brings the deep cold ocean currents up to the surface?

• Conduction
• Global Wind Patterns
• Convection Currents
• Temperature and salinity

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Why are surface currents at the surface of the ocean?

• colder temperature
• colder temperature & more salinty
• warmer temperature & less salinty
• less salinty

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NGSS.MS-ESS2-6