Earth Hazard

Question 1

Occur when energy stored is elastically strained rocks after due time is it suddenly released

Answer 1

Earthquake

Question 2

Waves as elastic energy

Answer 2

Seismic waves

Question 3

The point within the earth where the fault rupture starts

Answer 3

Focus or hypocenter of the earth quake

Question 4

The point on the surface of the earth directly above the focus

Answer 4

Epicenter

Question 5

Parts of an earthquake

Answer 5

Earthquake epicenter
Surface of earth
Fault plane
Earthquake focus

Question 6

2 Kinds of Seismic Waves

Answer 6

Body waves
Surface waves

Question 7

It is generate from the focus And travel in all directions through the body of the earth

Answer 7

Body waves

Question 8

2 types of body waves

Answer 8

Primary Waves
secondary Waves

Question 9

Have the highest velocity of all seismic waves-> reaches all seismograph first
Compressing and expanding material back and forth

Answer 9

Primary wave

Question 10

Travel with a velocity that depends only on the rigidity and density of the material through which they travel

Also called shear waves

Reaches seismograph after p waves

Answer 10

Secondary Waves

Question 11

Travel along paths nearly parallel to the surface of the earth
Up and down and side to side

Causes most shaking during earthquake

Answer 11

Surface waves

Question 12

The study of how seismic waves behave in the earth

Answer 12

Seismology

Question 13

Seismic Waves are measured and recorded on instruments called

Answer 13

Seismometers

Question 14

The resulting graph from seismometer is called seismogram