Question

Fill in the blank.

1. Lava with a higher content of has higher viscosity.

2. If a large explosion causes the magma chamber below a volcano to empty, the volcano can
collapse and form a

3. Shield volcanoes can form when less
lava flows quickly away from a vent.

4. During an oceanic plate convergence, the plate will sink.

5. The West Coast of the United State has features formed by _

6. During the
of two tectonic plates, magma wills the space between two tectonic plates.

7. The only volcanic activity that is not formed at tectonic plate boundaries is
and volcanoes are linked severe weather events.

Respond to the following based on your reading.

9. Briefly describe what causes a volcanic eruption to be explosive.​

Answer 1

Answer:

1. lava with a higher content of silica has higher viscosity
2. The volcano can collapse and form a caldera
3. shield volcanoes can form when less viscous lava flows quickly away from a vent
4. During an oceanic plate convergence, the denser plate will sink
5. The west coast of the united state has features formed by subduction
6. During the divergence of two tectonic plates, magma wills the space between two tectonic plates
7. The only volcanic activity that is not formed at tectonic plate boundaries is hot spots and volcanoes are linked severe weather events

    The response to all these is earthquakes

9. An explosive eruption is a very violent type of volcanic eruption and can be caused when enough gas has dissolved under pressure in a viscous magma in a way that when the lava is expelled it froths into volcanic ash when pressure is low at its vent

Explanation:

An explosive eruption is a very violent type of volcanic eruption and can be caused when enough gas has dissolved under pressure in a viscous magma in a way that when the lava is expelled it froths into volcanic ash when pressure is low at its vent

Answer 2

An earthquake is a phenomenon in which certain blocks under the crust of the earth collide with one another, which causes friction and hindrance on the earth's surface.

What are the explanations for filling the blanks?  

1. Lava with a higher content of silica has a higher viscosity.

The lava becomes thick and viscous which makes it difficult to flow.

2. The volcano can collapse and form a caldera.

The caldera is a depression that is formed with volcano eruption.

3. Shield volcanoes can form when less viscous lava flows quickly away from a vent.

Shield volcanoes are formed due to fluid and basaltic lava that flows runningly.

4. During an oceanic plate convergence, the denser plate will sink.

The denser plate is seen as sinking below to those which are less denser than creating an oceanic subduction zone.

5. The west coast of the united state has features formed by subduction.

The subduction leads to the formation of mountains, islands, and trenches that is seen in western areas of the US.

6. During the divergence of two tectonic plates, magma wills the space between two tectonic plates.

When tectonic plates separate then it creates a crack, which is filled with Magma forming a raised ridge.

7. The only volcanic activity that is not formed at tectonic plate boundaries is hot spots and volcanoes are linked to severe weather events.

The hot spot volcanoes are formed at large distances from plate boundaries, which affects the weather.

9. The eruption from the volcano is explosive due to the presence of gas, which is formed with pressure, and the composition of lava. When the magma gets increased with pressure then it releases with an explosion.

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