LET'S CHECKI
A. Write true if the statement is correct and false if not.
11. Rocks from volcanoes are used by scientists to study the interior of the earth.
12. When a volcano is about to erupt, the nearby places may also experience an earthquake.
B.
Answer the following questions:
1. How does a volcanic eruption occur?
2. What is the composition of pyroclastic materials?
3. How can a volcano become a source of electricity?
A. Write true if the statement is correct and false if not.
11. Rocks from volcanoes are used by scientists to study the interior of the earth.
12. When a volcano is about to erupt, the nearby places may also experience an earthquake.
B.
Answer the following questions:
1. How does a volcanic eruption occur?
2. What is the composition of pyroclastic materials?
3. How can a volcano become a source of electricity?
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Answers & Comments
Answer:
11. True
12. True
B.
1. Volcanic eruption occurs when magma ( molten rocks) rises up to the surface. It can occur when water underneath the surface interacts with the hot magma, resulting a hot steam. Pressure may build up and this may cause an explosion.
1. Volcanic eruption occurs when magma ( molten rocks) rises up to the surface. It can occur when water underneath the surface interacts with the hot magma, resulting a hot steam. Pressure may build up and this may cause an explosion.2. Pyroclastic flows consist two parts: a lower (basal) flow of coarse fragments that moves along the ground, and a turbulent cloud of ash that rises above the basal flow.
3. When molten rock and water meet, the extreme heat and pressure bring water to a "supercritical" state, where it is neither liquid nor gas. In this form, the water can carry more energy than normal steam, which could create up to 10 times the power output of other geothermal sources.
Explanation:
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