Ch 2 Plate Tectonics

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What makes continental plates different than oceanic plates? *

1 point

Oceanic plates are thicker

Oceanic plates are thinner

Continental plates have more volcanoes

Oceanic plates are older

Continental plates are more liquid

Which of the following are NOT evidence Wegener used to construct the idea of Continental Drift? *

1 point

1. Matching fossils across the ocean

2. Matching mountain belts of similar age and rock types

3. Evidence of drastic climate shifts in the geologic record

4. Earthquake locations lined up with crustal features

5. Matching the edges of the continental shelves

Which layer of the earth makes up the plates? *

1 point

Lithosphere

Asthenosphere

Mesosphere

Crust

Mantle

Which layer of the Earth can move internally or flow to allow the plates to move around on it? *

1 point

1. Inner core

2. Lithosphere

3. Athenosphere

4. Outer core

5. Mantle

Why do continents generally not subduct? *

1 point

1. Continents are pushed up by mantle convection, preventing subduction

2. Continents are too ductile to subduct

3. Continents are too low in density to subduct

4. Ocean plates move faster and do not allow continents to subduct

5. Continents are too strongly attached to ocean plates to subduct

What feature is associated with crustal divergence? *

1 point

1. Tsunamis

2. Largest earthquakes

3. Mid-ocean ridge

4. Volcanic arc

5. Trench

Why do high mountains like the Alps and Himalayas form when continents collide? *

1 point

1. There are not enough magmas to lubricate the collision

2. Gases released by decompression melting create a large bubble beneath the crust

3. The materials of continental plates are similar in density and don’t subduct beneath one another

4. They are made from less dense portions of the continents

5. Continental collisions occur very rapid

As a rift forms on a continent, what feature can form next? *

1 point

1. Ocean basin

2. Subduction zone

3. Transform fault

4. Collision

5. Supercontinent

What features or processes are common in hot spots? *

1 point

1. Rifts

2. Earthquakes

3. Trenches

4. Arcs

5. Volcanism

What makes the Hawaiian hot spot different than the Yellowstone hot spot? *

1 point

1. Yellowstone's higher elevation

2. Different types of tectonic plates

3. Different type of mantle below

4. Yellowstone is colder

5. Hawaii has more places for magma to come up

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