Plate Tectonics Topic 2 Revision

A magnitude 9 earthquake releases how many times more energy than a magnitude 8 earthquake?

• 10 times

• 64 times

• 32 times

• 100 times

the VEI of volcanoes stands for

After the main earthquake, smaller earthquakes occur, known as

I am standing on the point directly above the earthquake focus.

• subduction zone

• trench

• seismic wave

• epicentre

The energy of an earthquake is measured by the

Deep focus earthquakes are more destructive than shallow focus earthquakes.

• FALSE

• TRUE

Each increase in level of the richter scale shows ____ times the amount of shaking and ___ times the increase in energy released from the earthquake.

• 10, 300

• 10, 33

• 0, 8

• 10, 8

The Sumatra earthquake in Aceh, Indonesia was of a magnitude of

• 9.1

• 7.6

• 9.8

• 6.5

Select the features of a shield volcanoe

• vent

• secondary cones

• magma chamber

• pipe

At the divergent plate boundary, the mantle faces _____ pressure and a _____ melting point, to cause the mantle to melt to form magma which rises.