DO NOT WRITE ON THE SHEET – PUT YOUR ANSWERS ON LINED PAPER

Restless Earth

  1. What is the outer layer of the earth called? (the part we live on) ______(1)
  2. Which layer of the earth is made up of magma? ______(1)
  3. What is magma? ______(1)
  4. Which layer of the earth is solid metal? ______(1)
  5. What moves the plates around on top of the mantle? ______(1)
  6. What does subduction mean? ______(1)
  7. Describe viscous lava. ______(1)
  8. True or false? ‘Earthquakes only happen at conservative and constructive plate margins’ ______(1)
  9. What type of plate margin has an ocean trench and fold mountains? ______(1)
  10. What type of plate margin formed the island of Iceland? ______(1)
  11. What type of plate margin does not have volcanoes, only earthquakes?______(1)
  12. Describe where earthquakes and volcanoes are distributed across the world (where are they found?) (3)

  1. What is a geosyncline? ______(1)
  2. What builds up in a geosyncline to begin to form fold mountains? ______(1)
  3. Which is denser – oceanic or continental crust? ______(1)
  4. Which is older? Oceanic or continental crust? ______(1)
  5. Which is thinner? Oceanic or continental crust? ______(1)
  6. Give two differences between a composite and a shield volcano. (2)

Difference 1: ______

Difference 2:

______

  1. Write down one effect of the Mt St Helens volcano: (1)

An earthquake of 5.1 on the Richter scale caused a landslide on the north east side of the mountain. / Helicopters helped to search and rescue survivors. / The area was made into a National Park in 1982 and attracts millions of visitors each year.
Ash had to be cleared off roads to let emergency vehicles through. / 57 people died / Forest had to be replanted.
  1. Write down one SHORT TERM response of the Mt St Helens volcano: (1)

An earthquake of 5.1 on the Richter scale caused a landslide on the north east side of the mountain. / Helicopters helped to search and rescue survivors. / The area was made into a National Park in 1982 and attracts millions of visitors each year.
Ash had to be cleared off roads to let emergency vehicles through. / 57 people died / Forest had to be replanted.
  1. Write down one LONG TERM RESPONSE of the Mt St Helens volcano: (1)

An earthquake of 5.1 on the Richter scale caused a landslide on the north east side of the mountain. / Helicopters helped to search and rescue survivors. / The area was made into a National Park in 1982 and attracts millions of visitors each year.
Ash had to be cleared off roads to let emergency vehicles through. / 57 people died / Forest had to be replanted.
  1. Name the key feature for

each of the six labels. (6)

  1. Explain why a volcano occurs at a destructive plate margin (6)

Hints:

a) What direction do the plates move?

b) What moves the plates?

c) What happens to each of the plates?

d) Use key terms

  1. Explain why a volcano occurs at a constructive plate margin (4)
  1. Explain why fold mountains occur at a destructive plate margin (5)