Mid Ocean Ridge

Old oceanic crust is more dense than new oceanic crust because it is _______________.

• hot

• moving toward a deep-ocean trench

• cool

• closer to the mid-ocean ridge

In the 1960s, scientists studying the ocean floor discovered _____________.

• that the ocean floor had magnetic patterns

• the Titanic

• that the ocean floor had magical properties

• that the ocean floor was as smooth as a desert

Tags

NGSS.MS-ESS2-3

NGSS.MS-ESS2-2

What is it called where chains of mountains rise up to form the ocean floor?

• Mid-Ocean Ridge

• Subduction

• Deep-Ocean Trench

• Sea-Floor Spreading

• Magnetic Striping

Tags

NGSS.MS-ESS2-3

Where does sea-floor spreading occur?

• mantle

• mid-ocean ridges

• subduction zones

• deep-ocean trenches

The source of new oceanic crust being produced at the mid-ocean ridge is known as __________________.

• Mid-Ocean Ridge

• Subduction

• Deep-Ocean Trench

• Sea-Floor Spreading

• Magnetic Striping

Which of the following evidences does not support the sea floor spreading theory?

• strange pillow shaped rocks formed from cooled molten material

• ocean rocks organized in magnetized stripes

• the further the rocks are from the ridge the older they are

• underwater volcanoes

Which scientist proposed the theory of sea-floor spreading?

• Isaac Newton

• Rube Goldberg

• Alfred Wegener

• Harry Hess

Tags

NGSS.HS-ESS1-5

New crust is always formed at the...

• mid-ocean ridge

• deep-ocean trench

• asthenosphere

Tags

NGSS.MS-ESS2-1

Undersea mountain range.

• Rift

• Mid-ocean ridge

• seafloor spreading

• Continental drift

Tags

NGSS.MS-ESS2-3

Sea-floor spreading begins at the

• Deep ocean trench

• Mid-ocean ridge

• Continent's edge