Seismic waves

Question 0

What piece of equipment do scientists have to detect earthquake waves?

Answer 0

Seismometer.

Question 1

What is the name given to earthquake waves?

Answer 1

Seismic waves.

Question 2

Give the names of two different types of earthquake waves.

Answer 2

s-waves and p-waves.

Question 3

Compare the 2 types of seismic waves.

Answer 3

p-waves: faster, travel through both solids and liquids, arrives first
s-waves: slower, travel only through solids, arrives second.

Question 4

Which seismic wave arrives first?

Answer 4

P-waves

Question 5

Why do the waves change their direction sometimes gradually and sometimes suddenly?

Answer 5

Soundwaves will be reflected in some waves are affected, this can depend on the boundary the waves is hitting and/or travelling to and from. For example, if a P-wavehits the outer core Boundry sounds it will be reflected as they change from the different densities. This can make the wave travel abruptly or gradually.

Question 6

What do scientists call the point directly above where the earthquake starts?

Answer 6

Epicentre

Question 7

What do p and S waves stand for?

Answer 7

Primary waves

Secondary waves

Question 8

What method can be used to find the epicentre of an earthquake? And what is needed?

Answer 8

Triangulation

Speed of the p/s wave + delay time to find the distance in km.