問題一覧
1
What is magma?
Hot,molten rocks
2
2) Where are volcanoes formed?
All
3
(3) The volcanoes in Japan are formed at
a Convergent boundary.
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(4) Where are 60~70% of magma created on the Earth?
at Divergent boundary
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(5) Once magma reaches the surface, it is called
lava.
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(6) The area below the crust where magma is stored is
magma chamber.
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(7) What are solid volcanic products less than 2 mm?
Volcanic ash
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(8) What are solid volcanic products more than 2 mm?
Volcanic bomb
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9) What is the smoke seen in an eruption called?
Plume
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10) What is a path by which the magma rise called?
Vent
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11) Look at the picture. What is this called?
Breadcrust bomb
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12) When the lava from an eruption cools and hardens, what is it called?
Igneous rock
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13) Mt. Fuji is
a stratovolcano.
14
(14) Kilauea is
a shield volcano.
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15) Showa shinzan is
a lava dome.
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16) Mt. Tsukuba is
not a volcano.
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17) The main components of volcanic gas in the magma are
water vapor and carbon dioxide
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18) What kind of volcanoes form when magma has low viscosity(粘性)?
shield volcano
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19) When eruptions are violent, the silicon dioxide content of magma is
high.
20
(20) Which is NOT a benefit of volcanoes?
Solar energy