GEOLOGY

EARTH SCIENCE

VOLCANOES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
If lots of lava flows out in one spot on the surface of the Earth it forms a mountain and is called
A
magma.
B
an ocean.
C
a volcano.
D
a ring.
Explanation: 

Detailed explanation-1: -That’s because the viscous volcanic material doesn’t flow that far from where it is erupted, so it builds up in layers forming a cone-shaped volcano known as a stratovolcano.

Detailed explanation-2: -Molten rock below the surface of the Earth that rises in volcanic vents is known as magma, but after it erupts from a volcano it is called lava.

Detailed explanation-3: -Since it is lighter than the solid rock around it, magma rises and collects in magma chambers. Eventually, some of the magma pushes through vents and fissures to the Earth’s surface. Magma that has erupted is called lava.

Detailed explanation-4: -The crater is the bowl shaped opening located at the top of the volcano. The crater is also the steep sided walls made of hardened lava that surround the main vent.

Detailed explanation-5: -Cinder Cone Volcanoes. Composite Volcanoes (Stratovolcanoes) Shield Volcanoes. 12-Dec-2022

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