Volcanoes and Earthquakes Review

A weak spot in the Earth’s crust where molten material (magma) comes to the surface.

• volcano

• mountain

• hill

• valley

A molten mixture of rock forming substances, gases and water from the earth’s mantle.

• magma

• lava

• crater

• vent

When magma reaches the Earth’s surface

• magma

• lava

• crater

• vent

Major volcanic belt formed by the many volcanoes that rim the Pacific Ocean.

• Bermuda Triangle

• Dragon's Triangle

• Pacific Ring of Fire

• West Philippine Sea

Gently sloping mountains. Thin layers of low viscosity lava build up over time. Ex) the Hawaiian Islands

• Shield volcanoes

• Cinder cone volcanoes

• Composite volcanoes

• Lava plateaus

High viscosity lava produces ash, cinders and bombs. Those materials build up around the vent in a steep cone shaped hill/mountain. Ex) Sunset Crater in Arizona

• Shield volcanoes

• Cinder cone volcanoes

• Composite volcanoes

• Lava plateaus

Form when volcanoes alternate between quiet lava flows and explosive eruptions of ash, cinders and bombs. Tall, cone shaped mountain with alternating layers of ash and lava. Ex) Mt St. Helens, Washington and Mt. Fuji, Japan

• Shield volcanoes

• Cinder cone volcanoes

• Composite volcanoes

• Lava plateaus

When rain water mixed with ash during volcano eruption, it create what?

• mudflow

• lava

• poisionous gas

• fire

Hot gases moving out from the vent of the volcano during the volcano eruption is called

• lava

• pyroclastic flow

• lahar

• mudflow

Below are the positive impacts of volcanoes eruption except..

• precious minerals

• destroy vegetation and kill people

• create fertile soil

• attract tourists