Download Unit 3 Plate Tectonics Study Guide with answers

Unit 3 Plate Tectonics Study Guide
1. How fast do the plates move each year? Slowly 1-10 cm per year
2. How do the plates move in a convergent boundary? A divergent boundary? And a
transform boundary? Convergent – combine or collide; divergent- separate or
spread; transform - slide
3. What do the plates float on? Lithospheric plates float on asthenosphere
4. What is an example of a continental rift, divergent boundary? East African Rift
5. What is an example of a continental/continental convergent boundary?
Himalayas
6. What is an example of a transform boundary? San Andreas
7. What can be formed when to oceanic plates collide? Mid ocean ridges or
mountains under the sea
8. What is the driving force behind the plates? Convection currents in mantle
9. What is an underwater mountain chain called? Mid ocean ridges
10. Where are active volcanoes usually found? A line of volcanoes is formed above
the subducting plate.
11. What would cause a mountain to stop growing? When the forces that formed it
becomes inactive
12. Compare the Rocky Mountains and Appalachian Mountains?
13. Where do fault line mountains occur? When tension pulls the crust apart.
14. What causes uplift mountains? As a mountain erodes, the crust under it rises
15. What does the amount of silica in the lava change? The less the silica, the less
the viscosity, the faster the rate.
16. What are positive results of volcanoes? Soil and rocks are enriched with
nutrients.
17. What causes earthquakes? Vibrations are formed and move in the ground
along fault lines
18. Describe how primary waves travels? P-Waves slow down when they go
through solids and water.