Question 1 Whether or not a volcano erupts explosively depends on the _____ and

Question

Question 1

Whether or not a volcano erupts explosively depends on the _____ and _____ of the magma.

buoyancy; gas content

quesion 2

More silica in a magma results in _____.

higher density

question 3

Volcanic eruptions are effusive when _____ magma is involved.

felsic

Question 4

Explosive eruptions are most common in _____ tectonic settings.

subduction zones

Question 5

Shield volcanoes have gentle slopes and erupt _____.

felsic, effusive lava

Question 6

Magma viscosity depends on the _____ concentration.

calcium

Question 7

The most dangerous volcanic eruptions occur in _____ tectonic settings.

subduction zone

Question 8

The deadliest hazard associated with volcanic eruptions is _____.

sonic blasts

Question 9

Earthquakes associated with volcanic eruptions _____.

Both B and C are correct

Question 10

_____ lavas have the highest temperature and lowest silica content, making them _____.

Mafic; explosive

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Explanation / Answer

Question 1

Whether or not a volcano erupts explosively depends on the _____ and _____ of the magma.

Question 2. More silica in a magma results in ____

Question 3. Volcanic eruptions are effusive when _____ magma is involved.

Question 4. Explosive eruptions are most common in _____ tectonic settings.

Question 5. Shield volcanoes have gentle slopes and erupt _____.

Question 6. Magma viscosity depends on the _____ concentration.

Question 7. The most dangerous volcanic eruptions occur in _____ tectonic settings.

Question 8. The deadliest hazard associated with volcanic eruptions is _____.

falling ash and pyroclastic debris

Question 9. Earthquakes associated with volcanic eruptions _____.

represent magma rising to the surface

Question 10. _____ lavas have the highest temperature and lowest silica content, making them _____.

Mafic, effusive

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