Sea-Floor Spreading REVIEW

Sea-floor spreading begins at the

• Deep ocean trench

• Mid-ocean ridge

• Continent's edge

Magma, or molten material, __________ and hardens

• cools
• warms
• shrinks

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

The oceanic crust is pushed aside on both sides of the 

• Continent's edge
• Deep-ocean trench
• Mid-ocean ridge

Tags

NGSS.MS-ESS2-3

The oceanic crust _________ when it reaches the continental crust.

• sinks
• rises
• expands

Tags

NGSS.MS-ESS2-3

NGSS.MS-ESS2-2

The process that happens at the deep-ocean trench is called...

• sea-floor spreading
• adding material to the ocean floor
• subduction

Tags

NGSS.MS-ESS2-3

The land feature that happens when there is subduction is called a...

• mid-ocean ridge
• deep-ocean trench
• asthenosphere

Tags

NGSS.MS-ESS2-3

NGSS.MS-ESS2-2

New crust is always formed at the...

• mid-ocean ridge
• deep-ocean trench
• asthenosphere

Older crust is found towards the...

• Mid-ocean ridge
• Deep-ocean trench
• Asthenosphere

Tags

NGSS.HS-ESS1-5

If there are MORE mid-ocean ridges than subduction zones, what happens to the ocean?

• It gets larger
• It gets smaller
• It sinks

Tags

NGSS.MS-ESS2-3

If there are more subduction zones than mid-ocean ridges, what happens to the ocean?

• It gets bigger
• It gets smaller
• It sinks and rises

Tags

NGSS.MS-ESS2-3