Ocean Floor Features Quiz

What is one characteristic of the ocean floor?

• It is flat and featureless

• It has higher mountains and deeper valleys than land

• It is covered in sand dunes

• It is constantly changing shape

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NGSS.MS-ESS2-3

How do scientists gather information about the ocean floor?

• By traveling to the ocean floor in specialized vessels

• By using radio and infrared telescopes

• By observing the sky

• By studying rocks on land

What method do scientists use to map the topography of the ocean floor?

• Reflecting light off the bottom of the ocean

• Sending sound waves and reflecting them off the bottom of the ocean

• Using satellites to take pictures of the ocean floor

• Digging trenches and studying the soil

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What is plate tectonics responsible for?

• Creating mountains and valleys on land

• Causing earthquakes and tsunamis

• Changing the topography of the ocean floor

• Forming volcanoes and hot spots

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What happens at a divergent plate boundary?

• Two ocean plates move towards each other

• An oceanic plate moves under a continental plate

• Magma rises up to create a ridge

• Volcanoes form away from plate boundaries

What is formed when an oceanic plate moves under a continental plate?

• A ridge

• A trench

• A seamount

• A hot spot

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Where do volcanoes form at subduction zones?

• At the bottom of the ocean

• On land

• At hot spots

• Away from plate boundaries

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What are hot spots?

• Locations where magma rises up through a crack in the crust

• Areas with high temperatures on the ocean floor

• Places where underwater mountains form

• Regions where plate tectonics are most active

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NGSS.HS-ESS2-3

What is the continental shelf?

• The deepest part of the ocean

• The portion of the continent that is underwater

• A large flat region on the ocean floor

• A ridge or volcano underwater