Exam 1: Plate Tectonics

Question 1

3 compositional layers of the Earth

Answer 1

1. crust (silicates)
2. mantle (silicates)
3. core (iron)

Question 2

5 physical layers of the Earth

Answer 2

1. Lithosphere (rigid)- plates
2. Asthenosphere (plastic)
3. Mesosphere (solid)
4. Outer core (liquid)
5. Inner core (solid)

Question 3

How do various topographic features relate to plate boundaries? (Ridges, mountains, island chains, trenches)

Answer 3

Ridges:
Mountains:
Island chains:
Trenches:

Question 4

Describe the world distribution of volcanoes and earthquakes (based on in-class exercise).

Answer 4

x

Question 5

Explain and characterize the pattern of variation in depth of earthquakes at plate boundaries

Answer 5

x

Question 6

Determine which direction subduction occurs in based on earthquake patterns and the presence of a trench.

Answer 6

x

Question 7

Compare and contrast diverging and converging plate margins (boundaries) in terms of the different features seen at each margin as well as how igneous rocks form at each margin.

Answer 7

x

Question 8

Explain the fundamental “engine” for plate tectonics.

Answer 8

x