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- 1. Multiple Choice
What term should be used to describe a semi-liquid hot molten rock located beneath the Earth?
Lava
Magma
Rocks
Sand
- 2. Multiple Choice
In what part of the earth does magmatism happen?
Asthenosphere
Earth’s crust
Earth’s core
Lithosphere
- 3. Multiple Choice
What do you call the semi-liquid hot molten rocks found on the surface of earth once the volcano erupts?
Lava
Magma
Rocks
Sand
- 4. Multiple Choice
During partial melting of magma, where does decompression melting take place?
convergent boundary
mid-ocean ridge
subduction zone
all of these
- 5. Multiple Choice
Which of the following is NOT a factor of partial melting?
addition of volatiles
an increase in pressure
an increase in temperature
decrease in pressure
- 6. Multiple Choice
When water or carbon dioxide is added to hot rocks, the melting points of minerals within the rocks decrease. What process is being described?
decompression melting
flux melting
heat transfer
partial melting
- 7. Multiple Choice
During partial melting, which of the following minerals melt last?
Biotite
Feldspar
Quarts
None of these
- 8. Multiple Choice
What are the two most abundant elements in magma?
oxygen and iron
oxygen and magnesium
silicon and aluminum
silicon and oxygen
- 9. Multiple Choice
What will happen to the temperature of rocks during partial melting?
Decreases
Increases
Remains the same
All of these
- 10. Multiple Choice
During partial melting of magma, where does heat transfer take place?
convergent boundary
mid-ocean ridge
subduction zone
all of the these
- 11. Multiple Choice
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?
decompression melting
flux melting
heat transfer
partial melting
- 12. Multiple Choice
During partial melting, which of the following minerals melt first?
biotite
feldspar
quartz
both b and c
- 13. Multiple Choice
During partial melting of magma, where does flux melting take place?
convergent boundary
mid-ocean ridge
subduction zone
all of the above
- 14. Multiple Choice
Conduction in mantle happens when heat is transferred from hotter molten rocks to the Earth’s cold crust. What process is being described?
decompression melting
heat transfer
flux melting
partial melting
- 15. Multiple Choice
What process occurs if there are formation and movement of magma under
the earth’s crust?
Decompression melting
Dux melting
Heat transfer
Partial melting
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