SeaFloor Spreading

When looking at mid ocean ridges the oldest rocks are 

• In the middle
• Found close to the rift zone
• Found far from the mid ocean ridges

Tags

NGSS.HS-ESS1-5

The youngest rocks on the ocean floor are located ____.

• near continents

• at mid-ocean ridges

• far from mid-ocean ridges

• near Asia

Tags

NGSS.MS-ESS2-3

A vast, underwater mountain chain is called a(n) _________.

• ocean ridge

• oceanic crust

• deep-sea trench

• ocean floor sediment

Tags

NGSS.MS-ESS2-3

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

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

The process of ___________ continually adds new crust to the ocean floor along both sides of the mid-ocean ridge.

• plate tectonics

• seafloor spreading

• continental drift

• convection

Tags

NGSS.MS-ESS2-3

The scientist who proposed the theory of seafloor spreading is _________

• Alfred Wegener, a German scientist

• Harry Hess, an American geologist

• J.Tuzo Wilson, a Canadian scientist

• Kenn Bulaso, a Filipino educator

How is it possible for new crust to be formed without increasing the surface area of the Earth?

• Crust is recycled in subduction zones at the same time it is created at mid-ocean ridges

• New crust is underwater where it sinks

• New crust breaks more easily than old crust

• The oldest crust just breaks apart as the plates move

Tags

NGSS.HS-ESS1-5

NGSS.HS-ESS2-1

What are Mid-Ocean Ridges?

• A chain of underwater waterfalls 
• A chain of underwater volcanos
• A chain of underwater mountains
• A chain of underwater rocks

Tags

NGSS.HS-ESS2-1

Which is NOT evidence of sea-floor spreading?

• Temperature of rock

• Depth of sediment

• Magnetic stripes

• Fossil evidence

The zone where one plate slides under another is called the

• Convergent zone
• Subduction zone
• Transform zone
• Mantle zone

Tags

NGSS.MS-ESS2-3