A. Subduction zone
B. Divergent boundary
C. Collision zone
D. Transform boundary
Correct Answer: B. Divergent boundary
Explanation: The plates are moving away from each other. This type of boundary is called a divergent boundary.
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2. Which type of plate boundary or zone would be most likely to lead to above-ground volcanic activity?
A. Subduction zone
B. Divergent boundary
C. Collision zone
D. Transform boundary
Correct Answer: A. Subduction zone
Explanation: In a subduction zone, one plate slides beneath another. This leads to friction that can melt the crust and result in volcanic activity. Volcanic
activity also occurs along divergent boundaries, but almost all of these boundaries are located on the ocean floor.
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3. Which boundary or zone adds new material to the lithosphere (the hard outer crust of the Earth)?
A. Subduction zone
B. Divergent boundary
C. Collision zone
D. Transform boundary
Correct Answer: B. Divergent boundary
Explanation: Divergent boundaries are the result of the upward movement of material from the mantle. This leads to sea floor spreading and the
creation of new lithosphere.
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4. In what way does a transform boundary differ from the other boundary types?
A. Transform boundaries are always found on the ocean floor.
B. Transform boundaries can result in volcanic activity.
C. At a transform boundary, one plate slides beneath the other.
D. At a transform boundary, the plates move in a direction that is parallel to the boundary line.
Correct Answer: D. At a transform boundary, the plates move in a direction that is parallel to the boundary line.
Explanation: At a transform boundary, the plates slide past one another in a direction parallel to the boundary. In convergent and divergent boundaries,
plates move either directly toward one another or away from one another, perpendicular to the boundary line.
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5. The highest mountains in the world are the Himalayas, at the border between the Indian and Eurasian plates. The Himalayas formed in a
________________.
A. subduction zone
B. divergent boundary
C. collision zone
D. transform boundary
Correct Answer: C. collision zone
Explanation: The Himalayan Mountains are the result of a collision between the Indian subcontinent and Asia.
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