Earth's Oceans

What is side-scan sonar

• A technique used by submarines to navigate deep ocean canyons

• A technique used that directs sound waves at an angle towards the seafloor so that hills and other features can be displayed

• A technique used to help find sea life on the side of hills, cliffs, canyons, etc.

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NGSS.MS-PS4-2

Select all answers that apply:

What are some sources that scientists hypothesize that could be the origin of oceans?

• Comets

• Meteorites

• Volcanism

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NGSS.HS-ESS1-6

Approximately how much of Earth's surface is water?

• 90%

• 87%

• 71%

• 68%

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NGSS.MS-ESS2-4

What nickname did Earth earn because of the fact that its oceans cover about 71% of the surface

• The Wet Planet

• The Salty Planet

• The Marine Planet

• The Blue Planet

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What is sea level?

• The farthest point where you can see the ocean from land.

• The change in the depth of the ocean over the years.

• The level of the ocean's surface.

What are the ocean's major interaction with Earth's atmosphere?

• It provides heat and moisture, influencing large scale circulation patterns.

• It provides salt for the life within the biosphere.

• It is a huge carbon dioxide reservoir, keeping large amounts of carbon dioxide out of the air.

• It provides food for many of the ecosystems on Earth.

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The measure of the amount of dissolved salts in seawater is...

• saltiness

• saline levels

• salinity

The area of water under the surface layer that is a transitional zone is known as the...

• transitional layer

• thermocline

• bottom layer

How many major deep water masses are there?

• 1

• 3

• 5

• 7

What is a wave?

• Water rolling over itself

• You shake your hand to say hello to someone

• A rhythmic movement that carries energy through space or matter.

• Vertical motion of water due to energy

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