SQ3: Magmatism

What process occurs if there are formation and movement of magma under the earth’s crust?

• flux melting

• heat transfer

• magmatism

• decompression melting

What term should be used to describe a semi-liquid hot molten rocks located beneath the Earth?

• 1. lava

• sand

• rocks

• magma

1. In what part of the earth does magmatism happen?

• 1. Asthenosphere

• Earth’s crust

• 1. Earth’s core

• Lithosphere

1. What do you call the semi-liquid hot molten rocks found on the surface of earth once the volcano erupts?

• 1. lava

• sand

• 1. rocks

• magma

1. During partial melting of magma, where does decompression melting take place?

• 1. convergent boundary

• 1. mid-ocean ridge

• 1. subduction zone

• all of the choices

1. Which of the following is NOT a factor of partial melting?

• 1. addition of volatiles

• 1. decrease in pressure

• 1. an increase in pressure

• an increase in temperature

1. When water or carbon dioxide is added to hot rocks, the melting points of minerals within the rocks decrease. What process is being described?

• 1. flux melting

• 1. heat transfer

• 1. partial melting

• decompression melting

1. During partial melting, which of the following minerals melt last?

• 1. biotite

• 1. quartz

• 1. feldspar

• hornblende

1. What are the two most abundant elements in magma?

• 1. oxygen and magnesium

• 1. silicon and aluminum

• 1. silicon and oxygen

• 1. oxygen and iron

1. What will happen to the temperature of rocks during partial melting?

• 1. decreases

• 1. increases

• 1. remains the same

• 1. all of the choices