Teacher's notes (Earthquakes and Tsunamis)

Question 1

What is Attenuation?

Answer 1

Weakening or removal of high-frequency seismic waves

Question 2

What is the Epicentre?

Answer 2

Point on Earth’s surface directly anove the focus

Question 3

What is a Fault?

Answer 3

A fraction or zone of between 2 blocks of rocks; allows blocks to move relative to each other

Question 4

what is the focus?

Answer 4

Point of energy release; radiates out in all directions

Question 5

What is Intensity?

Answer 5

Qualitative way to describe/compare earthquakes

Question 6

Explain Liquefaction

Answer 6

Loosely packed, water-logged sediments at or near the ground surface lose their strength in response to strong ground shaking

Question 7

What is Magnitude

Answer 7

Objective measurement of the energy radiated by an earthquake; Richter magnitude vs moment magnitude

Question 8

What is Material Amplification

Question 9

What is Megathrust Earthquake (subduction zone earthquake)

Question 10

explain a P-wave

Question 11

Explain an S-wave

Question 12

Explain Surface Waves

Question 13

What is a Tsunami

Answer 13

wave or series of waves caused by the displacement of a large volume of water