G8 Earthquake review

What provides the energy for Earth's tectonic plates to move?

• Wind currents

• Ocean currents

• Convection currents in the mantle

• Gravitational pull

What occurs when tectonic plates that have been stuck suddenly release their built-up energy?

• They slowly drift apart

• They melt and form new crust

• They release stored energy in a violent jolt

• They create new mountain ranges

A magnitude 7.0 earthquake releases an amount of energy equivalent to how many Hiroshima nuclear bombs?

• Approximately 5

• Approximately 15

• Approximately 30

• Approximately 50

How is the energy from an earthquake transmitted through the ground?

• As heat

• As sound

• As waves

• As light

What is a significant problem for buildings during an earthquake if they are not earthquake-resistant?

• They become too heavy and sink into the ground.

• They are designed to stand on moving ground, causing them to sway uncontrollably.

• They are designed to stand on ground that is not moving, causing them to crumble and collapse when energy waves pass through.

• They attract more energy waves, increasing the shaking intensity.

What causes people to be thrown off balance during an earthquake?

• The sudden change in air pressure.

• The side-to-side movement of energy waves passing through the ground.

• The strong winds generated by the earthquake.

• The visual disorientation from collapsing structures.

What is the epicentre of an earthquake?

• The exact point underground where an earthquake takes place.

• The point on the Earth's surface directly above where an earthquake happens.

• The deepest point within the Earth's crust where tectonic plates meet.

• The area where the most significant damage occurs.

What is the focus (or hypocentre) of an earthquake?

• The point on the Earth's surface directly above where an earthquake happens.

• The exact point underground where an earthquake takes place.

• The area where the energy waves first reach the surface.

• The location where the earthquake's magnitude is measured.