How Volcanoes Erupt

What is a volcanic eruption?

• An opening on the Earth's surface

• Ejection of lava, rocks, gas, or ash

• A type of igneous rock

• A part of the rock cycle

Which part of a volcano is a large space where magma is stored?

• Crater

• Cone

• Magma chamber

• Main vent

What happens to magma as it rises through the vent towards the crater?

• It cools and solidifies

• It forms igneous rock

• Gas bubbles grow larger

• It becomes part of the mantle

What determines the type of volcanic eruption?

• The size of the crater

• The amount of gas and mineral content in the magma

• The temperature of the lava

• The location of the volcano

What type of eruption involves volcanic material being ejected violently?

• Effusive eruption

• Explosive eruption

• Basalt eruption

• Granite eruption

What type of rock is formed when lava cools and solidifies?

• Sedimentary rock

• Metamorphic rock

• Igneous rock

• Sandstone

What is the role of gas bubbles in a volcanic eruption?

• They cool the magma

• They cause the magma to rise

• They form the cone

• They solidify the lava