Earthquakes

Question 1

How are seismic waves produced?

Answer 1

-produced in an earthquake.
-spread out from the epicentre

Question 2

What is the epicentre?

Answer 2

The nearest point of the surface to where the earthquake originates. That actual origin is called the focus

Question 3

What are the 2 types of earthquakes (seismic waves)

Answer 3

-Primary seismic waves (P-waves)
-Secondary seismic waves (S-waves)

Question 4

Are Primary seismic waves longitudinal or transverse?

Answer 4

longitudinal
They push and pull on the material as they move through the Earth.

Question 5

Are Secondary seismic waves longitudinal or transverse?

Answer 5

transverse
They travel slower than P-waves
They shake the material they pass through inside the Earth from side to side

Question 6

Can P- waves travel through the liquid outer core?

Answer 6

Yes, they can travel through liquid outer core
-but they are refracted that the boundary between the mantle and molten outer core
-due to the sudden density medium change
-therefore their speed changes and are refracted

Question 7

Can S-waves travel through the molten outer core

Answer 7

No
Because they are transverse waves