VQ1 Which statement is FALSE ? 1. Granite is a felsic intrusive rock and basalt

Question

VQ1
Which statement is FALSE ?
1. Granite is a felsic intrusive rock and basalt is a mafic extrusive rock

2. Extrusive volcanic rocks have small crystals becase they cool fast

3. Plutonic is another word for intrusive

4. Granite is a plutonic intermediate rock

5. Magma intrusions in Hawaii are likely to be hotter than granitic magma




VQ2
How did the residents of Vestmannaeyjar, Iceland, save their harbor from a lava flow?
1. They dug channels that diverted the lava flow away from the harbor.
2. They extracted more geothermal energy that was being produced by the volcano, decreasing the volume of lava erupted
3. They chilled the lava flow with water, making the flow solidify before it blocked the harbor
4. They constructed high cement walls around the harbor and the lava solidified against the walls
5. As the lava cooled, they blasted the new rock away and dumped it offshore




VQ3
Which of the following volcanic hazards is typically the deadliest for people?
1. Pyroclastic flows from Hawaiian eruptions.

2. Ash falls from Hawaiian eruptions.

3. Ash falls from maars.

4. Pyroclastic flows from stratovolcanoes.

5. Ash falls from stratovolcanoes.

Explanation / Answer

VQ1 - Magma intrusions in Hawaii are likely to be hotter than granitic magma VQ2 - They chilled the lava flow with water, making the flow solidify before it blocked the harbor
VQ3 - Pyroclastic flows from Hawaiian eruptions

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