Lecture 3: The Earth's Core and Geomagnetism

Question 1

P

Answer 1

P-wave in mantle

Question 2

S

Answer 2

S-wave in mantle

Question 3

K

Answer 3

P-wave in outer core

Question 4

I

Answer 4

P-wave in inner core

Question 5

J

Answer 5

S-wave in inner core

Question 6

c

Answer 6

Reflection off outer core

Question 7

i

Answer 7

Reflection off inner core

Question 8

Crystal anisotropy

Answer 8

Fe atoms line up along N-S axis during crystallisation, increasing rigidity along the axis

Question 9

Latent heat

Answer 9

Heat required to convert a solid into a liquid or vapour, or a liquid into a vapour, without change of temperature

Question 10

Dipmeter

Answer 10

Compass whose needle can move in a vertical plane

Question 11

Self-exciting dynamo

Answer 11

Dynamo that generates its own magnetic field