Earthquakes occur only once or twice a year.

• True
• False

The Earth’s surface is very rigid.

• True
• False

Earth’s surface floats on molten rock.

• True
• False

Tectonic plates are very small.

• True
• False

Oceans float on tectonic plates.

• True
• False

Volcanoes and mountains are formed when tectonic plates are moving apart.

• True
• False

In most earthquakes, faults are vertical.

• True
• False

Which of the following describes the direction in which the Earth’s plates can move?

• They can move to the right.
• They can move to the left.
• They can move up and down.
• All of the Above

Which of the following conditions is involved in producing earthquakes?

• Plate movement forms faults
•  Faults store energy
• Plates release energy as they slide against each other.
• All of the Above

 If Earthquake X measured 1 and Earthquake Y measured 3 on the Richter scale, then

• Earthquake Y had three times the ground motion of Earthquake X.
• Earthquake Y had ten times the ground motion of Earthquake X.
•  Earthquake Y had 100 times the ground motion of Earthquake X.
• None of the above