Download Handout 2.3-2 Standard 2 Objective 3.a, b, d, and e

Handout 2.3-2
Standard 2 Objective 3.a, b, d, and e
Plate Tectonics and Mountains
Earthquakes and Plate Tectonics
1. The major mountain belts are
located along
• B. convergent plate boundaries.
2. What does the location of the two
major mountain belts tell scientists?
• D. Most mountains form as a result of
collisions between tectonic plates.
3. When oceanic lithosphere and
continental lithosphere collide at
convergent plate boundaries, what may be
formed?
• A. mountains
4. What happens when moving plates
collide at convergent plate boundaries?
• C. The oceanic lithosphere subducts beneath
the continental lithosphere.
5. What happens when plate collision
produces large-scale deformation?
• B. High mountains are uplifted.
6. What is produced by the partial
melting of the mantle and crust?
• B. magma that may erupt to form volcanic
mountains on Earth’s surface
7. Where do volcanic mountains
commonly form?
• Where two plates whose edges consist of
oceanic lithosphere collide.
8. What happens during the collision of
two plates whose edges consist of oceanic
lithosphere?
• The denser plate subducts beneath the other
oceanic plate.
9. When the denser oceanic plate
subducts, what happens?
• Fluids from the subducting lithosphere cause
partial melting of the overlying mantle and
crust, resulting in magma breaking through
the oceanic lithosphere. An arc of volcanic
mountains is formed on the ocean floor.
10. Why did the subduction of the oceanic lithosphere
of the Indian plate stop when the continental
lithosphere of India collided with the continental
lithosphere of Eurasia, and what happened to the
Himalayas?
• The two continents had equally dense
continental lithosphere. The deformation from
the collision uplifted the Himalayas.
11. Why are the Himalayas still
growing taller?
• The plates are still colliding
12. Geologists think that earthquakes
are caused by
• B. elastic rebound.
13. The sudden return of elastically
deformed rock to its undeformed shape is
called
• A. elastic rebound.
14. The location within Earth along a fault
where the first motion of an earthquake
occurs is called the
• C. focus.
15. Define epicenter
• The point on Earth’s surface directly above an
earthquake’s focus
16. Why do earthquakes that usually cause
the most damage have shallow foci?
• By the time vibrations from an earthquake
that has a deep focus reach the surface, much
of their energy has dissipated.
17. When rocks along a fault slip into new
positions, they release energy in the form
of vibrations called
• C. seismic waves.
18. Where do seismic waves travel?
• A. outward in all directions from the focus
through the surrounding rock
19. How do surface waves form?
• From motion along a shallow fault or from the
conversion of energy when P waves and S
waves reach Earth’s surface.
Matching 20-23
20. tectonic plate
boundaries
a.
a point at which two continental
plates converge, diverge, or
move horizontally in opposite
directions
21. convergent plate
boundaries
b.
a point at which plates move
away from each other
22. divergent plate
boundaries
c.
a point at which stress on rock is
the greatest
23. continental plate
boundaries
d.
a point at which plates move
toward each other and collide
The End!!!