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Presentation transcript:

GeologicalCharacteristicsPhysicalCharacteristicsBiologicalCharacteristics Waves & Currents I’m an Oceans Genius Genius

A gently sloping shelf of land extending from the shoreline to the continental edge (covered by shallow water)

Continental Shelf

A gently sloping hill that connects the continental slope to the ocean floor. This is also where sediments are deposited.

Continental Slope

Valleys cut deep into the ocean floor

Trenches

Define the continental slope.

A sharp underwater hill that connects the continent to the ocean

Identify 5 characteristics of an abyssal plain.

Flat, deep, cold, dark, little to no life/plants, covers most of the ocean, smoothest place on Earth

True or False Ocean water is not made up of pure water.

True

Describe the relationship between salinity and depth.

As depth increases, so does the salinity level.

What type of ocean water has the lowest levels of salinity?

Shallow water near the poles

Compare the salinity levels of ocean water and fresh lake water.

Ocean water is about 220 times saltier than fresh lake water.

Identify four ways that salt got into the ocean.

1) Evaporation 2) Hydrothermal Vents 3) Undersea Volcanoes 4) Rocks from Rivers

True or False All animals in the ocean depend on plankton for survival.

True

The largest portion of familiar animals found in the ocean are known as __________________.

Nekton

This zone covers 90% of the ocean’s space.

Midnight Zone

What is an ecosystem?

An area made up of living and nonliving things in their environment

Describe 5 physical changes related to ocean depth.

1. Temperature 2. Amount of Light 3. Pressure 4. Salinity 5. Animal/Plant Life

Currents are massive flows of water, like ___________ in the seas.

Rivers

Currents move warm water ______ from the equator.

Away

Can currents affect land climate?

Yes

Identify 3 causes of currents.

1. Wind 2. Temperature Change 3. Spinning of the Earth

The Gulf Stream begins in the ______ and travels north along the _____ coast of the North America all the way to the ______ coast of Northern ______.

1. Gulf of Mexico 2. East 3. West 4. Europe

Sailors often use this current to travel faster and more easily.

The Gulf Stream

True or False The zones in the ocean are based upon the amount of marine life that live there.

False

A self contained underwater breathing apparatus is also known as ___________ to divers.

Scuba

Why do some scientists describe the ocean ecosystem more as a food web than a food chain?

Because many sea creatures eat more than one kind of creature, and some creatures eat others from their own group.

Oceans cover what percentage or fraction of the Earth’s surface?

¾ 75%