structures using waves

Question 1

What does an earthquake produce

Answer 1

seismic waves which travel out through the earth

Question 2

How are seismic waves detected

Answer 2

using a seismometer

Question 3

What happens when a seismic wave reaches a boundary between different layers of materials

Answer 3

when they reach a boundary ( with different properties) inside the earth, some of the waves will be absorbed and some will be refracted

Question 4

What happens when seismic waves are refracted

Answer 4

they change speed gradually, resulting in a curved path

Question 5

What happens if the properties of the wave change suddenly

Answer 5

the wave speed changes abruptly causing a kink in the path

Question 6

What do seismologists do

Answer 6

work out the time taken for the shock waves to reach each seismometer and what parts of the Earth don’t receive shock waves at all

Question 7

What are the 2 different types of waves

Answer 7

p waves and s waves

Question 8

What are the features of P waves

Answer 8

longitudinal
travel through solids and liquids
travel faster than S waves
Can travel through the Earths core

Question 9

Features of a S wave

Answer 9

transverse
cant travel through liquids or gases
slower than P waves
cannot travel through the Earths core- curve around it