Other questions in this quiz

2. How are new volncaic islands formed

  • Build up of debris
  • Plume is continous so eruptions are frequent, seamounts eventually build up enough to reach the surface
  • Plates rising from under the sea

3. Why can some older volcanic islands become inactive

  • The plume from hot spot is stationary but the plate with the island moves so isn't fed new magma
  • The plume stops and no more magma rises
  • They eroded by the sea

4. Why is magma created as the plume rises

  • Due to a fall in pressure (decompression melting)
  • The lithosphere melts
  • Its already there

5. What happens to older inactive islands

  • Get attcked by marine erosion and fall below sea level as seamounts
  • Nothing
  • They eventually fall into the sea

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