Mid Ocean

At the Mid-Ocean Ridge and active volcanoes you can find:

• fault lines

• earthquakes

• older crust

• newest crust

Tags

NGSS.MS-ESS2-1

At which age strip in the picture will new crust form?

• 5

• 4

• 3

• 2

• 1

Tags

NGSS.MS-ESS2-3

Ferromagnetic molecules make up little shavings of iron that are in rock and align themselves to magnetic north when the rock is molten and liquid. Where do we find this?

• Past the subduction zones where land and ocean plates collide

• On either side of mid-ocean ridges

• On the land under the Antarctic cap

• In the layers of rock surrounding the Grand Canyon

• In the convection cells of the mantle

Tags

NGSS.HS-ESS1-5

NGSS.HS-ESS2-1

At the mid-ocean ridge new crust forms and spreads apart the plates at a rate of 1 inch per year. How long would it take for the plates to be 10 inches apart?

• 10 months

• 1 year

• 10 years

• 100 years

• 1000 years

A large rotating ocean current is called a:

• tsunami

• gyre

• wave

• swell

Tags

NGSS.MS-ESS2-6

This landform can occur at a divergent plate boundary.

• trench

• mountain

• mid-ocean ridge

• fault

In Seafloor Spreading, molten material rises from the mantle and erupts or flows out

• along the edges of all the continents

• in the deep ocean trenches

• along mid-ocean ridges

• in the north and south poles

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

The diagram shows the magnetic polarity (they look like zebra stripes) of the seafloor at the Mid-Ocean Ridge. Which of the following statements is true about the magnetic polarity pattern of the ridge?

• Stripes of normal polarity and reversed polarity DO NOT alternate across the ocean bottom.

• Stripes form mirror images (are symmetrical) on either side of the mid-ocean ridges

• Stripes form different images on either side of the mid-ocean ridges

• there is not a pattern that is created

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

Using the picture, explain how seafloor spreading (divergent boundary) and subduction (convergent boundary) recycle Earth’s materials?

• New crust is forming at a mid-ocean ridge and older crust is suducting during seafloor spreading into the mantle and hardening

• New crust is forming in a trench and older crust is suducting into the mantle and melting

• New crust is forming at a mid-ocean ridge and older crust is suducting into the mantle and melting

• New crust is forming at a trench and older crust is colliding at rift valley into the mantle and hardening

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-2

Where do most mid-ocean ridges lie under?

• The bottom of the ocean

• At the surface

• Thousands of meters of water

• One meter of water