Earthquake Basics Assessment

Front

How do tectonic plates fit together?

Back

Like a jigsaw puzzle

Front

What are faults in the Earth's crust?

Back

Fractures or cracks where movement occurs

Front

Which type of fault is caused by compressional forces?

Back

Reverse faults

Front

Which forces cause normal faults?

Back

Tensional forces

Front

What is the primary movement direction in a strike-slip fault?

Back

Horizontal

Front

What does each whole number increase on the Richter scale represent?

Back

A tenfold increase in the amplitude of the seismic waves

Front

What do Primary (P) waves do to rocks?

Back

Compress and expand them in the direction of wave propagation

Front

Where do surface waves move?

Back

Along the Earth's surface

Front

What is the main characteristic of Secondary (S) waves?

Back

Slower waves that shake the ground perpendicular to travel

Front

What is a seismograph used for?

Back

To record and measure the motion of the ground during an earthquake