1. Choose the correct type of mountain formation: sedimentary layers are pushed together, folded, and broken and formed by erosion.
A. ocean ridges
B. lifted fault block mountains
C. tilted fault block mountains
D. folded mountains

2.
What geologic process generates the world's longest undersea mountain chain called the Mid-Atlantic Ridge?

A. volcanic hotspots create chains of mountains that become islands
B. folding and breaking of undersea layers until they form ridges or mountains
C. divergent plates spread apart, and magma pushes up and creates undersea mountains
D. Ocean sediment builds up over millions of years

3. Why are earthquakes not as forceful near ocean ridges compared to ocean trenches?

A. Rock near ridges is cooled rapidly and loses its volcanic explosiveness but becomes heated near trenches.
B. Rock near ridges is heated and softer than denser hardened rock that is pulled into trenches.
C. Rocks near ridges is expanding and rock near trenches is compacted.
D. There is very little movement of rock near ocean ridges but more rock movement near trenches.

4 Choose the geologic formation that fits the description: rocks are stretched, moved vertically into blocks, and dropped; the lower blocks are called graben and the taller blocks called horst.

A. ocean ridges
B. folded mountains
C. tilted fault block mountains
D. lifted fault block mountains