Earthquakes

Question 1

How are earthquakes developed?

Answer 1

The breakage of rocks along a fault

Question 2

Can we predict earthquakes?

Answer 2

No

Question 3

Where do most earthquakes develop?

Answer 3

Concentrated along plate boundaries.

The edge of oceanic and continental plates

Question 4

Where are they at depth?

Answer 4

Subduction zone

Question 5

What kind of volcanoes do the Japanese Islands have?

Answer 5

Strato-volcanoes with felsic and intermediate lava

Question 6

What does the blue circles mean on a map illustrating earthquakes?

Answer 6

Shallow; does the most damage and will feel

Question 7

What does the green circles mean on a map illustrating earthquakes?

Answer 7

Intermediate

Question 8

What does the red circles mean on a map illustrating earthquakes?

Answer 8

deep

Question 9

When an earthquake occurs what is being released?

Answer 9

energy waves

Question 10

What’s the focus/ hypocenter?

Answer 10

The location where rocks actually break

Question 11

What’s the epicenter?

Answer 11

The point on the ground above the focus

Question 12

What does the prefix epi- mean?

Answer 12

on top of

Question 13

Where does the energy come from in moving plate tectonics?

Answer 13

the core

Question 14

What are P (primary)- wave?

Answer 14

Waves that travel through solids and liquids.

Question 15

What are S (shake/ secondary) waves?

Answer 15

Waves that travel only through solids.

Question 16

How do P- waves move?

Answer 16

Left to Right

Question 17

How do S-waves move?

Answer 17

Up and Down

Question 18

What are surface waves?

Answer 18

Waves that travel on the surface

Question 19

Which waves arrive first?

Answer 19

P waves

Question 20

What are also P-waves?

Answer 20

Sound waves

Question 21

Which wave does most of the damage?

Answer 21

Surface waves

Question 22

What are surface waves compose of?

Answer 22

P and S -waves

Question 23

How do P - waves travel?

Answer 23

Parallel to the direction of propogation. (Compressed)

Question 24

How do S - waves travel?

Answer 24

Perpendicular to the direction of propogation. (Traversed)

Question 25

Where are P - waves slowed?

Answer 25

Less dense fluids

Question 26

What we feel an earthquake, what are we actually feeling?

Answer 26

Surface waves

Question 27

What are tsunamis?

Answer 27

Giant sea waves

Question 28

How are tsunamis developed?

Answer 28

Through reverse faults (an underwater earthquake)

Question 29

Where do tsunamis develop?

Answer 29

Underwater, oceanic plates, above an undersea earthquake

Question 30

How can earthquakes be used to understand the interior of the Earth?

Answer 30

Due to seismic waves

Question 31

What is Thailand near?

Answer 31

A deep thrust fault

Question 32

What’s a seismogam?

Answer 32

A record produced by a seismograph

Question 33

What’s a seismograph?

Answer 33

An instrument that measures and records details of earthquakes, such as force and duration

Question 34

How are S-waves used to study the Earth’s inner structure?

Answer 34

The waves refract on the crust

Question 35

How are P-waves used to study the Earth’s inner structure?

Answer 35

The waves are reflected from the mantle and core and declines in density as it moves though liquid

Question 36

Why do earthquakes occur along the edges of plate boundaries?

Answer 36

Because pressure is built up and needs to be released

Question 37

When we feel an earthquake, what are we actually feeling?

Answer 37

Surface waves