Earthquakes

Question 1

Earthquake definition

Answer 1

A vibration in earths crust

Question 2

Focus definition

Answer 2

Point in earth’s crust where earthquake begins

Question 3

Epicentre definition

Answer 3

Point immediately above the focus

Question 4

Seismic Waves definition (4)

Answer 4

Waves of energy
That pass thru the crust
From the focus
to the epicentre

Question 5

P + S Waves are

Answer 5

Seismic Waves that travel through the crust (from focus)

Question 6

L Waves are

Answer 6

Seismic Waves that travel across the surface (from epicentre)

Question 7

Tsunami definition

Answer 7

A series of waves formed due to earthquakes under the seabed

Question 8

Whats a seismograpgh

Answer 8

An instrument that measures the magnitude of seismic waves

Question 9

What’s the richer scale

Answer 9

Measurement of the magnitude of an earthquake

Question 10

RS 2.5-5.4

Answer 10

Barely damage

Question 11

RS 5.5-6.0

Answer 11

Some damage

Question 12

RS 7-8+

Answer 12

bad.

Question 13

Name ways to predict earthquakes (3)

Answer 13

*satellite info
*animal warnings
*tsunamis warning systems

Question 14

Explain how satellite info can help predict an earthquake

Answer 14

Satellites give info about changes in temperature on earths surface
They predict where crust is unstable

Question 15

Explain how animal warning can help predict earthquakes

Answer 15

Animals behave strange before earthquakes
They cab detect vibrations in rocks

Question 16

Explain how tsunami warning systems can help predict an earthquake (4)

Answer 16

Sensors can detect:
*seismic data about earthquakes that lead to tsunamis
*pressure recorders on the floor
*tide gauges that measure tides
*open ocean markers that measure changes in sea level

Question 17

Reasons for deaths (tsunamis and earthquakes) (5)

Answer 17

*population density
*how developed infrastructure is
*climate
*flooding
*efficiency of resoue operations

Question 18

How can tsunamis/earthquakes affect settlements and the environment (3)

Answer 18

*destroys infrastructure
*washes away/contaminated soil
*radiation and safety hazards

Question 19

Economic and social side effects or earthquakes/tsunamis (5)

Answer 19

*loss of homes
*no food en water
*messed up economy
*lost jobs
*vulnerability can lead to exploitation

Question 20

Strategies to reduce the impact of earthquakes (6)

Answer 20

*install warning systems
*support systems have plans on what to do
*rapid and efficient services
*build safer buildings
*prepare in advance