Clues From the Seafloor Readworks

Who introduced the hypothesis of continental drift in 1915?

• Alfred Wegener

• Albert Einstein

• Charles Darwin

• Isaac Newton

Tags

NGSS.MS-ESS2-3

What did Alfred Wegener's hypothesis suggest?

• The continents were always in their current positions

• The continents had once been part of a single landmass

• The continents were formed by meteor impacts

• The continents are shrinking

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NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

What did scientists discover in the 1940s and 1950s on the seafloor?

• Deep ocean trenches

• Sunken ships

• Giant underwater caves

• Underwater mountains called mid-ocean ridges

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NGSS.MS-ESS2-2

What type of rock did scientists find at mid-ocean ridges?

• Granite

• Basalt

• Limestone

• Sandstone

What did scientists conclude about mid-ocean ridges?

• They are formed by meteor impacts

• They form along huge cracks in Earth's crust

• They are made of limestone

• They are places where the Earth's crust is sinking

Tags

NGSS.MS-ESS2-3

What process did scientists call the formation of new oceanic crust?

• Volcanic eruption

• Mountain building

• Continental drift

• Seafloor spreading

Tags

NGSS.MS-ESS2-3

What happens to older crust as new crust is added at mid-ocean ridges?

• It sinks into the mantle

• It gets pushed outward

• It forms mountains

• It turns into magma

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NGSS.MS-ESS2-1

What did scientists theorize about the movement of continents?

• Continents are shrinking

• Continents are stationary

• Continents are moving closer together

• Continents bordering the ocean slowly move apart

Tags

NGSS.MS-ESS2-3

Where did scientists guess old crust is destroyed?

• In underwater caves

• On the ocean surface

• In deep ocean trenches

• At mid-ocean ridges

What is the main idea of the passage?

• The formation of mountains

• The study of meteor impacts

• The process of seafloor spreading and continental drift

• The discovery of underwater caves

Tags

NGSS.MS-ESS2-3