Download Volcanic Eruptions - During an eruption, molten rock, or magma, is

Volcanic Eruptions
- During an eruption, molten rock, or magma, is forced to the Earth’s surface
- Magma that flows onto the Earth’s surface is called lava
Volcanoes – are areas of Earth’s surface through which magma and volcanic gases pass
Magma chamber – is a body of molten rock deep underground that feeds a volcano
Vents – the cracks in the Earth’s crust through which volcanic material passes
- If the water content of magma is high, an explosive eruption is more likely
- Magma that has a high silica content also tends to cause explosive eruptions
- Pyroclastic material forms when magma is blasted into the air and hardens
- Pyroclastic flows are produced when enormous amounts of hot ash, dust, and gases are ejected
from a volcano