Ocean Floors

Why is much of the ocean floor so difficult to see?

• Water distorts our view of the ocean floor

• Sunlight cannot reach that far down

• The ocean floor is buried under ash from volcanic eruptions

• The ocean floor is covered in seaweed and other forms of plant life

Where might you find a continental shelf?

• A few dozen kilometers off the coast of California

• Ten kilometers off the coast of Florida

• In the exact center of the Pacific Ocean

• Where the Gulf of Mexico meets the shore

A continental slope is most similar to which land feature?

• a valley

• a mountain

• a beach

• a cliff

An abyssal plain is most similar to which land feature?

• a mountain

• a prairie

• a valley

• a canyon

Ocean currents deposit sediments on the ocean floor. What is sediment? Choose the best answer

• seaweed

• the bodies of dead ocean creatures

• a type of coral

• rock, dirt, sand and piece of organic material

What part of the earth makes up the seafloor?

• the crust

• the mantle

• the core

• the mesophere

Where might you find undersea volcanoes?

• in mid ocean ridge

• in an abyssal plain

• in a trench

• on a continental shelf

Tags

NGSS.MS-ESS2-3

where are you most likely to find a trench?

• at a convergent boundary between tectonic plates

• at a divergent boundary between tectonic plates

• at a subductive boundary between tectonic plates

• at a transform boundary between tectonic plates

Tags

NGSS.MS-ESS2-3

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BrainPOPBrainPOP Jr.BrainPOP

Place the following events in sequence: A) A volcanic island emerges; B) A seamount is formed; C) A volcano begins erupting

• B A C

• B C A

• C B A

• C A B

Tags

NGSS.MS-ESS2-2