Chapter 27 Earth's Changing Surface

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-ESS2-2

NGSS.MS-ESS2-3

Where does sea-floor spreading occur?

• In space

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

• At subduction zones

Tags

NGSS.MS-ESS2-3

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

Tags

NGSS.MS-ESS1-4

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

Tags

NGSS.MS-ESS2-3

What type of boundaries can cause earthquakes?

• Convergent

• Divergent

• Transform

Tags

NGSS.MS-ESS3-2

What type of boundary creates deep ocean trenches?

• Convergent

• Divergent

• Transform

What type of boundary creates volcanoes?

• Convergent

• Divergent

• Transform