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Load the Developing the theory section, and answer the following.
1) What four major scientific developments spurred the formulation of the plate-tectonics theory?
(A)
(B)
(C)
(D)
The Mid-Ocean Ridge [70 k]
2) Make an observation about the Mid-Ocean Ridge.
3) Make an observation about Computer-generated topographic map of the Mid-Ocean Ridge.
(HINT: What do the colors represent?)
Magnetic Stripes and Isotopic Clocks
4) How do Magnetic striping and geologic time relate to each other?
5) Compare The Mid-Ocean Ridge [70 k] and Earthquake zones [175 k]
Load the section Understanding plate motions
6)
Define each of the following and draw arrows to
show the movement:
Divergent boundaries
Convergent boundaries
Transform boundaries
Plate boundary zones
SECTION: DIVERGENT BOUNDARIES
(SCROLL DOWN from the Understanding Plate Motions ABOVE
7) What is their example(s) for a Divergent boundary?
8) What is the rate of spreading apart for this boundary?
9) What country does the Mid Atlantic Ridge cut into two pieces?
10) Are there volcanoes in Iceland? Is there volcanic activity on the Mid Atlantic Ridge?
View the picture of Historically Active Volcanoes, East Africa [38 k]
11) What are the red triangles?
12) What is the shaded area?
13) What makes this a Divergent Boundary?
14) Is new crust being formed along the Mid-Atlantic Ridge and the Rifts in Africa? EXPLAIN.
SECTION: COVERGENT BOUNDARIES
15) Why is it believed that the earth’s crust being destroyed along some plate boundaries?
16) Describe where the earth’s crust is being recycled.
17) Convergence can occur between what types of plates?
(A)
(B)
(C)
18) What two geologic activities are occurring off the west coast of South America as a result of an oceanic plate and a continental plate converging?
19) The RING of FIRE is an example of what type of collision? Ring of Fire
20) Are there volcanoes along the Ring of Fire? What else occurs on the Ring of Fire?
21) When two oceanic plates converge what is formed?
22) Name the trench formed by the Philippine Plate and the Pacific Plate.
23) What is notable about the Challenger Deep that is located at the southern end?
24) What types of islands are formed where two oceanic plates converge?
25) Is there volcanic activity near a trench?
26) Do they give the Hawaiian Islands as an example of an Island Arc? What are their examples?
27) Why don’t two continental plates cause a subduction zone?
28) What do they compare two continental plates colliding to?
29) Which plate is heavier, an oceanic one or a continental one?
30) Two plates sliding horizontally past one another is …
31) Where is there a transform fault boundary in the United States
SECTION: "Hotspots"
32) Define/Explain Hot Spots
33) TRUE or FALSE. Hot Spots are near plate boundaries.
34) Where are two places in the United States where a Hot Spot occurs?