Multiple Choice. Choose the letter of the best answer. Write the chosen letter on a separate sheet of paper. 1. What process occurs if there are formation and movement of magma under the earth's crust? A. decompression melting B. flux melting C. heat transfer D. partial melting 2. What term should be used to describe a semi-liquid hot molten rock located beneath the Earth? A. lava B. magma C. rocks D. sand 3. In what part of the earth does magmatism happen? A. Asthenosphere B. Earth's crust C. Earth's core D. Lithosphere 4. What do you call the semi-liquid hot molten rocks found on the surface of earth once the volcano erupts? A. lava B. magma C. sand D. rocks 5. During partial melting of magma, where does decompression melting take place? B. mid-ocean ridge D. all of the above A. convergent boundary C. subduction zone 6. Which of the following is NOT a factor of partial melting? A. addition of volatiles C. an increase in temperature 7. When water or carbon dioxide is added to hot rocks, the melting points of minerals within the rocks decrease. What process is being described? a. decompression melting c. heat transfer B. an increase in pressure D. decrease in pressure b. flux melting d. partial melting 8. During partial melting, which of the following minerals melt last? A. biotite B. feldspar C. quartz 9. What are the two most abundant elements in magma? A. oxygen and iron C. silicon and aluminum B. oxygen and magnesium D. silicon and oxygen 10. What will happen to the temperature of rocks during partial melting? A. decreases B. increases C. remains the same A. decompression melting C. heat transfer D. none of the above D. all of the above 11.During partial melting of magma, where does heat transfer take place? B. mid-ocean ridge A. convergent boundary C. subduction zone D. all of the above 12. Mantle rocks remain solid when exposed to high pressure. However, during convection, these rocks tend to go upward (shallower level), and the pressure is reduced. What process is being described? A. decompression melting B. flux melting C. heat transfer D. partial melting 13. During partial melting, which of the following minerals melt first? C. quartz A. biotite B. feldspar 14.During partial melting of magma, where does flux melting take place? B. mid-ocean ridge D. all of the above A. convergent boundary C. subduction zone 15.Conduction in mantle happens when heat is transferred from hotter molten rocks to the Earth's cold crust. What process is being described? B. flux melting D. partial melting D. both b and c

Multiple Choice. Choose the letter of the best answer.
Write the chosen letter on a separate sheet of paper.
1. What process occurs if there are formation and movement of magma under the earth's crust?
A. decompression melting
B. flux melting
C. heat transfer
D. partial melting
2. What term should be used to describe a semi-liquid hot molten rock located beneath the Earth?
A. lava
B. magma
C. rocks
D. sand
3. In what part of the earth does magmatism happen?
A. Asthenosphere
B. Earth's crust
C. Earth's core
D. Lithosphere
4. What do you call the semi-liquid hot molten rocks found on the surface of earth once the volcano erupts?
A. lava
B. magma
C. sand
D. rocks
5. During partial melting of magma, where does decompression melting take place?
B. mid-ocean ridge
D. all of the above
A. convergent boundary
C. subduction zone
6. Which of the following is NOT a factor of partial melting?
A. addition of volatiles
C. an increase in temperature
7. When water or carbon dioxide is added to hot rocks, the melting points of minerals within the rocks decrease. What
process is being described?
a. decompression melting
c. heat transfer
B. an increase in pressure
D. decrease in pressure
b. flux melting
d. partial melting
8. During partial melting, which of the following minerals melt last?
A. biotite
B. feldspar
C. quartz
9. What are the two most abundant elements in magma?
A. oxygen and iron
C. silicon and aluminum
B. oxygen and magnesium
D. silicon and oxygen
10. What will happen to the temperature of rocks during partial melting?
A. decreases B. increases C. remains the same
A. decompression melting
C. heat transfer
D. none of the above
D. all of the above
11.During partial melting of magma, where does heat transfer take place?
B. mid-ocean ridge
A. convergent boundary
C. subduction zone
D. all of the above
12. Mantle rocks remain solid when exposed to high pressure. However, during convection, these rocks tend to go
upward (shallower level), and the pressure is reduced. What process is being described?
A. decompression melting
B. flux melting
C. heat transfer
D. partial melting
13. During partial melting, which of the following minerals melt first?
C. quartz
A. biotite
B. feldspar
14.During partial melting of magma, where does flux melting take place?
B. mid-ocean ridge
D. all of the above
A. convergent boundary
C. subduction zone
15.Conduction in mantle happens when heat is transferred from hotter molten rocks to the Earth's cold crust. What
process is being described?
B. flux melting
D. partial melting
D. both b and c

Answer:

1. A. decompression melting

2. B. magma

3. A. Asthenosphere

4. A. lava

5. D. all of the above

6. C. an increase in temperature

7. B. an increase in pressure

8. C. quartz

9. D. silicon and oxygen

10. B. increases

11. D. all of the above

12. A. decompression melting

13. A. biotite

14. D. all of the above

15. D. both b and c

Answer:

1. A. decompression melting
2. B. magma
3. A. Asthenosphere
4. A. lava
5. D. all of the above
6. B. an increase in pressure
7. B. flux melting
8. C. quartz
9. D. silicon and oxygen
10. B. increases
11. D. all of the above
12. A. decompression melting
13. B. feldspar
14. B. mid-ocean ridge
15. D. partial melting

Explanation:

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