1. Mid Ocean Ridge and Other Plate Boundaries
ICS Earth Science Quiz 3
Mid Ocean Ridge and Other Plate Boundaries

2. Question #1
When looking at a diagram of the mid-ocean ridge, the newest crust is always …
A) on the right
B) furthest away
C) on the bottom
D) near the center

3. Question #2 In diagrams of sea-floor spreading the stripes represent…
A) the color of the sea floor
B) the magnetic polarity of the sea floor
C) the age of the crust
D) subducting oceanic trenches

4. Question # 3
The drawing shows the magnetic pattern of crust at the mid-ocean ridge. If the dark blue crust is 120 million years old (MYA). The light purple crust would be about…
A) 40 MYA
B) 80 MYA
C) 140 MYA
D) 200 MYA

5. Question # 4 What type of plate boundary is the Mid-Atlantic Ridge?
A) Oceanic - Oceanic Divergence
B) Oceanic – Oceanic Convergence
C) Transform
D) Oceanic – Continental Divergence

6. Question # 5
What type of plate boundary causes the earthquakes that we feel in California?
A) Oceanic-Oceanic
B) Convergent
C) Divergent
D) Transform

7. Question #6
If two pieces of continental crust spread apart they most likely create …
A) a rift valley
B) volcanic island arcs
C) earthquakes
D) subduction zones

8. Questions #7 When plates converge, which plate is going to subduct?
A) The first plate there.
B) The continental plate
C) The less dense plate
D) The more dense plate

9. Question # 8
What happens to the rocks carried deep into a subduction zone?
A) they are exposed to weathering and erosion
B) heat and pressure make them melt
C) they break into pebbles and sediment
D) they rise up to make mountains

10. Question #9
If scientists discovered a chain of volcanic islands, most likely they were formed by…
A) the melting of oceanic crust as it subducts
B) the collisions of oceanic plates
C) transform boundary plates rubbing
D) the magnetic striping of sea floor spreading

11. Question #10
Rising magma spreads the crust apart and makes small undersea volcanoes at …
A) Transform plate boundaries
B) Convergent plate boundaries
C) Divergent plate boundaries
D) Both B and C

12. Question # 11
Which of the following is not true about what happens when 2 continental plates push together?
A) neither plate is dense enough to sink
B) it creates volcanoes
C) it creates huge mountain ranges
D) an example of it is the Himalayas

13. Question #12
All of the following happen at continental – oceanic convergence except
A) oceanic trenches
B) subduction
C) rift valleys
D) volcanoes

14. Question #13 Earthquakes are usually caused by …
A) spreading at divergent plate boundaries
B) subduction at convergent plate boundaries
C) grinding at transform plate boundaries
D) both “B” and “C”

15. Question #14
If there was a volcanic arc along the coast of a continent, it would have formed from…
A) oceanic – continental convergence
B) continental – continental convergence
C) oceanic – oceanic divergence
D) oceanic – continental divergence

16. Question #15
Why do mountains form at continental – continental convergent boundaries?
A) because the plates slide past each other
B) most of the crust does not subduct
C) the magnetic polarity reverses
D) the land spreads apart