Volcanoes

Magma travels up through the

Magma which has reached the surface

Volcanic activity occurs at:

The worlds most active earthquake and volcanic zone

Three stages of a volcano

An active volcano

A dormant volcano

An exctinct volcano

Products of volcanic eruptions

Hot ash, lava, rock fragments

Pyroclasts are also called

Pyroclastic flows

Poisonous gases

Ash, dust, pumice

Torrential rain forms as a result of

A mixture of rock fragments and water

What causes magma to rise?

The violence of an earthquake is determined by

Silica helps to

Basic lava

Acidic lava

Convex dome volcanoes

Shield volcanoes and basalt plateaux

Hotspots

Extrusive volcanic landforms

Intrusive volcanic landforms

Rock in batholiths

Sill

Dyke

Laccolith

Lopolith

Types of volcano

Shield volcanoes

Dome volcanoes

Composite volcanoes

Hydrothermal areas

Geysers

Hot springs

Black smokers

Prediction of volcanic activity

Short wavelength quakes

Long wavelength earthquakes

Harmonic tremor

Positive effects of volcanic activity

Negative effects of volcanic activity

Effect on the environment