Other questions in this quiz

2. Why can some older volcanic islands become inactive

  • They eroded by the sea
  • 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

3. 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

4. Why is heat generated at the outer core/ mantle boundary

  • Thermal currents
  • Possibly due a concentration of radioactive elements
  • Heat from the core
  • Heat from the Sun

5. Why is magma created as the plume rises

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


No comments have yet been made

Similar Geography resources:

See all Geography resources »See all Plate tectonics resources »