Download 1. What was the name of the super continent that was

Plate Tectonics Unit Test Study Guide
Test Date: ​
Friday, November 6th
Name: ___​
KEY​
__​
___________________
Date: ___________ Class: ___________
1. What was the name of the super continent that was once one land mass?
Pangaea
2. Define the process of sea-floor spreading (include the age of the rock close to
& far from the mid-ocean ridge. ​
The seafloor spreads as plates move apart.
Older rock is found far away from the mid-ocean ridge as newer rock forms
near the ridge.
3. What is the Theory proposed by Wegener that explains the movement of the
continents over millions of years? ​
Continental Drift
4. Define divergent boundary.​
Places where plates pull or move away from each
​
other
5. Draw a picture to show how the plates move at divergent boundaries. ​
←​​
→ 6. Name & Describe the stress that occurs at divergent boundaries. ​
Stress of
Tension rock is pulled apart making it thin in the middle (like warm bubble
gum or silly putty)
7. How does the rock break at divergent boundaries? (What is the fault?) ​
Normal
Fault – the rock drops down as it breaks
8. List the 2 geologic features/events that occur at divergent boundaries. ​
A rift
valley forms on continents or seafloor spreading happens to create new ocean
floor (basalt)
9. Define convergent boundary. ​
Places where 2 plates crunch or collide into
​
each other
10. Draw a picture to show how the plates move at convergent boundaries ​
→​
← ​
11. Name & Describe the stress that occurs at convergent boundaries?
Stress of​​
Compression - rock presses together as the plates collide
12. How does the rock break at convergent boundaries?​
(What is the fault?)
​
A Reverse Fault – the rock is pushed up
13. List 2 geologic features/events that occur at convergent boundaries. ​
Mountain
ranges may form or volcanoes may form at subduction zones
14. Define transform boundary.​
Places where plates build up stress then slide
​
past each other
15. Draw a picture to show how the plates move at transform boundaries ​
→​
← ​
16. Name & Describe the stress that occurs at transform boundaries. ​
Stress of
Shearing (“like the rock has been cut with scissors or shears”)
17. How does the rock break at transform boundaries? (What is the fault?)
Strike-Slip Fault
18. List the geologic feature/event that occurs at transform boundaries. Name
the famous one in CA.​
Ea​
rthquakes - like what happens along the San Andreas
Fault in California
19. What is the process that the recycles old rock as a denser plate dives under a
less dense plate? This process may trigger volcanic eruptions nearby. ​
Subduction
20. In the mantle, heat is transferred as soft rock flows slowly in cycles known as
what? These make the plates move around on Earth’s surface. ​
CONVECTION
CURRENTS
21. Describe the asthenosphere and lithosphere. T
​he lithosphere is made up of
the top of the mantle and the crust. It is very rigid. It is on top of the
athenosphere, a layer of hotter, softer rock in the upper mantle.
22. Draw a cross section of Earth. Include the continental crust, oceanic crust,
lithosphere, asthenosphere, mantle, outer core, and inner core. Also describe if
they are solid or liquid.