Chapter 7-Earthquakes And Faults

Question 1

The shaking or the trembling of the earth that is volcanic or tectonic in origin

Answer 1

Earthquake

Question 2

Where earthquakes happen

Answer 2

Earthquakes happen along tectonic plate bounderies or along active faults

Question 3

How earthquakes happen

Answer 3

Earthquakes occurs because energy from rocks in the earth’s crust is released, not because the rocks are shaking as they are pushed or pulled

Question 4

States that the outer layer of earth’s surface consists of huge segments called tectonic plates

Answer 4

Theory of plate tectonics

Question 5

States that earth once consisted of a vast supercontinent called pangaea which later broke into several fragments or continents

Answer 5

Continental drift theory

Question 6

Who proposed the continental drift theory?

Answer 6

Alfred Wegener

Question 7

States that the seafloor has been moving apart.

Answer 7

Seafloor spreading theory

Question 8

Who proposed the seafloor spreading theory?

Answer 8

Harry Hess

Question 9

Cause the movement of tectonic plates. Can be tensional or compressional

Answer 9

Convention current

Question 10

Occurs when one convention current moves clockwise in adjacent but separate areas,tending to pull the lithosphere above it in opposite directions

Answer 10

Tensional movement

Question 11

A narrow,deep part of the lithosphere

Answer 11

Trench

Question 12

PHIVOLCS

Answer 12

Philipinne institute of volcanology and seismology

Question 13

3 types of faults

Answer 13

Dip slip fault
Strike slip fault
Oblique slip fault

Question 14

The movement is up or down and parallell to the dip of inclined fault surface

Answer 14

Dip slip fault

Question 15

The movement or slip is horizontal and parallell to the strike of the fault

Answer 15

Strike slip fault

Question 16

Has both strike slip and dip slip displacements

Answer 16

Oblique slip fault

Question 17

Earthqakes caused bu sudden displacements along fault fissures in the solid and rigid layers of the earth are called?

Answer 17

Tectonic earthquakes

Question 18

Refers to the immediate area where the displacement of the earth takes place

Answer 18

Hypocenter

Question 19

On earth’s surface directly above the focus is the?

Answer 19

Epicenter

Question 20

It measures how strong an earthquake was felt in a certain locality or area

Answer 20

Intensity

Question 21

A type of seismic wave that travels only through earth’s surface is called a?

Answer 21

Surface wave

Question 22

The study of seismic phenomena

Answer 22

Seismology

Question 23

Refers to the downward movement of soil or rock

Answer 23

Landslides

Question 24

Is a deformation on the ground that marks the intersection of the fault plane with earth’s surface

Answer 24

Ground rupture

Question 25

Are giant sea waves caused by undersea

Answer 25

Tsunamis

Question 26

What to do during an earthquake

Answer 26

Duck cover and hold
Watch out for falling objects
Keep calm and do not panic
Keep away from glass windows and heavy shelves

Question 27

Is the scientific field concerned with protecting society as well as the natural and man made environment from earthquakes

Answer 27

Earthquake engineering

Question 28

Major tectonic plates

Answer 28

Pacific plate, indo Australian plate, south american plate, african plate, antartic plate, eurosian plate

Question 29

Minor tectonic plates

Answer 29

Philippine sea plate. Carribbean plate. Arabian plate. Cocos plate. Indian plate