Volcanic Formation and Eruptions

Magma forms beneath the Earth's crust in a magma chamber. As tectonic plates move, pressure builds, causing magma to erupt as lava. When lava cools, it forms a new crust layer. Repeated eruptions build up the crust, eventually forming a volcano.

What is the term for the space where magma collects beneath the Earth's surface?

• Volcanic basin

• Crust cavity

• Lava pool

• Magma chamber

What causes magma to eventually erupt through the Earth's surface?

• Evaporation of magma

• Cooling of magma

• Movement of tectonic plates

• Decrease in pressure

What is magma called once it erupts onto the Earth's surface?

• Molten rock

• Lava

• Basalt

• Igneous fluid

How does lava contribute to the formation of a volcano?

• By eroding the Earth's surface

• By cooling and hardening to form layers

• By mixing with ocean water

• By evaporating into the atmosphere

What is the result of repeated volcanic eruptions over time?

• Development of a mountain

• Erosion of the Earth's crust

• Creation of a plateau

• Formation of a valley