EVERYDAY SCIENCE

SCIENCE

EARTH SCIENCE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The molten rock that comes from a volcano after it has erupted is known as what?
A
Lava
B
Magma
C
Crust
D
None of the above
Explanation: 

Detailed explanation-1: -Scientists use the term magma for molten rock that is underground and lava for molten rock that breaks through the Earth’s surface.

Detailed explanation-2: -A volcanic eruption is when lava and gas are released from a volcano-sometimes explosively. The most dangerous type of eruption is called a ‘glowing avalanche’ which is when freshly erupted magma flows down the sides of a volcano.

Detailed explanation-3: -lava, magma (molten rock) emerging as a liquid onto Earth’s surface. The term lava is also used for the solidified rock formed by the cooling of a molten lava flow.

Detailed explanation-4: -The erupting molten rock flows out and down the sides of the volcano crater destroying anything in its path, creating various formations both in its flow and as it cools. Lava formations are responsible for a lot of the landscaping and rock composition in a volcanic area.

Detailed explanation-5: -Lava is made up of crystals, volcanic glass, and bubbles (volcanic gases). As magma gets closer to the surface and cools, it begins to crystallize minerals like olivine and form bubbles of volcanic gases. When lava erupts it is made up of a slush of crystals, liquid, and bubbles.

There is 1 question to complete.