Earth's Changing Surface Review

What is sea-floor spreading?

• The process in which new magma comes up from the mantle, making new crust and pushing the old crust away.

• The process in which the ocean floor gets smaller.

• The process in which new crust causes the ocean floor to get thicker, decreasing the depth of the ocean.

Tags

NGSS.MS-ESS2-1

Where does sea-floor spreading occur?

• In space

• Along mid-ocean ridges like the Mid-Atlantic Ridge

• At subduction zones

When we consider sea-floor spreading, where is the oldest crust?

• The oldest crust is closest to the mid-ocean ridge

• The oldest crust is farther away from the mid-ocean ridge

• New crust is not added to the ocean floor, so there is no such thing as older or new crust

Which type of boundary occurs when tectonic plates scrape past each other?

• Convergent

• Divergent

• Transform

Which type of boundary occurs when tectonic plates move towards each other?

• Convergent

• Divergent

• Transform

Which type of boundary occurs when tectonic plates move away from each other?

• Convergent

• Divergent

• Transform

What type of boundary can be found along mid-ocean ridges?

• Convergent

• Divergent

• Transform

What type of boundaries can cause earthquakes?

• Convergent

• Divergent

• Transform

What type of boundary creates deep ocean trenches?

• Convergent

• Divergent

• Transform

What type of boundary creates volcanoes?

• Convergent

• Divergent

• Transform