Chapter 3- Earthquakes & Mountains

Question 1

Trough-like structure formed when rocks bend downward during folding:

Answer 1

Syncline

Question 2

Arch-like structure formed when rocks buckle upward during folding:

Answer 2

Anticline

Question 3

Any of the smaller earthquakes or tremors that often follow an earthquake:

Answer 3

Aftershock

Question 4

A type of earthquake wave that consists of rhythmic push-pull motion in the direction of wave travel:

Answer 4

P wave

Question 5

Point on the Earth’s surface directly above an earthquake’s hypocenter:

Answer 5

Epicenter

Question 6

Type of earthquake wave that consists of a rhythmic, side-to-side motion that occurs at right angles to the direction of wave travel:

Answer 6

S wave (secondary wave)

Question 7

Type of building construction in which the building rests on isolations that act as movable “stilts” and absorb the seismic energy of an earthquake:

Answer 7

Base-isolated system

Question 8

Device added to a structure to absorb some of the seismic energy of an earthquake:

Answer 8

Energy-dissipating device

Question 9

Type of fault in which rocks along one side of the fault move horizontally along the fault:

Answer 9

Strike-slip fault

Question 10

Earthquake magnitude scale based on measuring the size of the earthquake’s source:

Answer 10

Moment magnitude scale

Question 11

Most active earthquake zone, which borders the Pacific Ocean:

Answer 11

Circum-Pacific belt

Question 12

what can earthquake waves help us study?

Answer 12

earths interior

Question 13

how many seismometers must be used to detect the exact location of an earthquake

Answer 13

three