Volcanoes

Volcanoes

Volcanoes

  • A volcano occurs when an opening in the earth's surface allows magma to escape.
  • Like earthquakes, they occur on plate boundaries where plates rub against each other or one plate is pushed under another.

There are 3 main types of earthquakes:

  • Active - They can erupt at any time.
  • Dormant - They have not erupted recently (within the last 2000 years).
  • Extinct - They will not erupt again.

Although earthquakes cause deaths and there are man reasons not to live near earthquakes (on plate boundaries) there are advantages such as the soil is often fertile.

Case studies

Natural Hazards

Continental drift

Continental drift

Natural Hazards

Earthquakes

Earthquakes

Natural Hazards

Plate tectonics

Plate tectonics

Natural Hazards

Volcano - Mount St. Helens

Volcano - Mount St. Helens

Natural Hazards

Natural Hazards - practice questions

Natural Hazards - practice questions

Natural Hazards

Explain why the plates move across the earth's surface

Explain why the plates move across the earth's surface