Seafloor Spreading RTI

How can new crust be formed during seafloor spreading without increasing the surface area of the Earth?

• Old crust is destroyed at subducting convergent plate boundaries.

• New crust is underwater where it sinks.

• New crust breaks apart more easily than old crust.

Tags

NGSS.MS-ESS2-1

This is a map of the ocean floor. Which TWO places would have the newest?

• A

• B

• C

• D

Tags

NGSS.MS-ESS2-3

In the process of seafloor spreading, where does molten material rise from the mantle and erupt?

• along the mid-ocean ridge

• in deep ocean trenches

• along the edges of all the continents

• at the north and south poles

Which of the following patterns is observed when examining a map of the age of the seafloor?

• The oldest crust is at mid-ocean ridges, as you move away the crust gets younger and younger.

• The youngest crust is at mid-ocean ridges, as you move away the crust gets older and older.

• The age of the seafloor is the same everywhere.

Tags

NGSS.MS-ESS2-3

What kind of current helps move the plates?

• Convection currents in the crust

• Convection currents in the mantle

• Wind currents along the equator

• Polar Easterlies that move over Greenland

Tags

NGSS.MS-ESS2-3

What is the source of energy that drives plate tectonics?

• radioactive elements

• the sun

• the mantle and core

• the crust

Tags

NGSS.MS-ESS2-3

NGSS.MS-ESS2-1

The image shows a diagram of the ocean floor near a mid-ocean ridge. Where would the oldest rock be found?

• L
• M
• N
• O

Tags

NGSS.MS-ESS2-3

NGSS.MS-ESS1-4

Convection currents in the _________ pull the seafloor apart.

• Crust

• Mantle

• Core

Tags

NGSS.MS-ESS2-3

The OLDEST rocks on the seafloor are located?

• Closest to the mid-ocean ridge

• Farthest from the mid-ocean ridge

In sea-floor spreading, molten material rises from the mantle and erupts

• in deep-ocean trenches

• along the edges of all the continents

• along mid-ocean ridges

• at the north and south plate