Oceanography Unit 4: PT & Seafloor Features

Which best describes the continental shelf?

• a flat underwater valley

• a region of mountains in the deep ocean

• a shallow area of sediment near the shore

• a region with high water pressure

Where is the ocean deepest?

• ocean trench
• volcanic island
• abyssal plain 
• mid-ocean ridge

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NGSS.HS-ESS2-1

The large flat region of the ocean floor that is often covered in sediments is called the

• ocean trench

• continental shelf

• abyssal plain

• seamount

What part of the ocean floor would be the most difficult to explore due to extreme pressure, cold temperatures, and darkness?

• continental slope

• sea mount

• trench

• abyssal plain

What part of the ocean floor would be most affected by sea level change?

• abyssal plain
• continental shelf
• continental slope
• trench

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NGSS.MS-ESS2-4

A trench is formed at what zone?

• subduction
• divergent
• convergent
• strike-slip

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NGSS.HS-ESS1-5

NGSS.HS-ESS2-1

Seafloor spreading creates

• Trenches

• Mid-ocean ridges

• Plateaus

• Caverns

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NGSS.MS-ESS2-3

Which of the following causes Earth's tectonic plates to move?

• Energy from the Sun
• Magnetic Pole Reversal
• Convection currents in the mantle
• Faults in Mountain Ranges

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NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

Which of the following is NOT evidence to support the theory of plate tectonics?

• Fossils
• Mountains
• Glaciers
• Sand Erosion

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NGSS.HS-ESS1-5

In sea-floor spreading, molten material rises from the mantle and erupts

• along the edges of all the continents.

• along mid-ocean ridges.

• in deep-ocean trenches.

• at the north and south poles.

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NGSS.MS-ESS2-1

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3