Earthquakes

Question 1

Focus

Answer 1

Physics a point at which rays of life,heat,or other radiation, meet after being refracted or reflected.

Question 2

Epicenter

Answer 2

A point, directly above the true center of disturbance, from which the shock waves of an earthquake apparently radiate.

Question 3

Seismograph

Answer 3

Any of various instruments for measuring and recording the vibrations of earthquakes.

Question 4

Primary waves

Answer 4

A P-waves are a type of body wave, called seismic waves in seismology, that travel through a continuum and are the first waves from an earthquake to arrive at a seismograph. The continuum is made up of gases (as sound waves), liquids, or solids, including the Earth.

Question 5

Secondary waves

Answer 5

A transverse earthquake wave that travels through the interior of the earth and is usually the second conspicuous wave to reach a seismograph.

Question 6

Surface wave

Answer 6

A seismic wave that travels along or parallel to the earth’s surface.

Question 7

Seismic wave

Answer 7

A wave of energy that generated by an earthquake or other vibration and that travels within he earth or along its surface.