Magnetism

Question 1

Properties of magnets

Answer 1

1. repel / attract
2. free 1 part points north
3. contains magnetic field

Question 2

Magnetic Poles

Answer 2

every magnet has 2 poles - north & south

Question 3

Magnetic Force

Answer 3

push or pull (area around the magnet)

Question 4

Magnetic Field

Answer 4

field lines that curve from NORTH TO SOUTH pole - same direction & do not intersect

Question 5

Single Magnetic Field

Answer 5

Pg 9

Question 6

Combined Magnetic Field North / North or South / South

Answer 6

Pg 11

Question 7

Combined Magnetic Field North / South

Answer 7

Pg 11

Question 8

Atom Structure

Answer 8

non-living, nucleus has neutrons / protons, spinning electrons on outside in shells

Question 9

Magnetic Domains

Answer 9

most electrons randomly move - if lined up forms a domain

Question 10

Ferromagnetic Material & Example

Answer 10

magnetic material - iron, nickel, and cobalt

Question 11

Magnetic Law

Answer 11

magnets can be made, destroyed, or broken apart

Question 12

Making Magnets

Answer 12

1. put material in magnetic field
2. rub it on something magnet can make temporary magnets

Question 13

Destroying Magnets

Answer 13

1. hit material hard to unalign the domains
2. heat it up

Question 14

Breaking Magnets

Answer 14

1. split it - makes to different magnets (2 poles each)

Question 15

Earth as a Magnet

Answer 15

Sir WIlliam Gilbert discovered compass ALWAYS points north due to metals in the core producing a magnetic field

Question 16

Magnetic Declination

Answer 16

distances between compass north and geographical north - different due to shifting plates on earth’s crust

Question 17

Earth’s Magnetic Field Affects Items How?

Answer 17

as metallic materials lie on earth’s crust becomes magnetic itself

Question 18

Magnetic Earth to Determine Rock Layers

Answer 18

earth contains magnetic rock that will line up with the poles that causes layers & scientist use the layers to date rocks / fossils around it

Question 19

Magnetosphere

Answer 19

earth’s magnetic field (1,000-25,000 kilometers up)

Question 20

Van Allen Belts

Answer 20

doughnut shaped regions that protons / electrons travel very fast & push on the earth’s magnetic field

Question 21

Van Allen Belts Cause?

Answer 21

1. solar winds
2. auroras (if particles get close to earth’s surface)

Question 22

Explanation of Magnetic Declination

Answer 22

due to mid-ocean ridges (Atlantic ocean) getting bigger but subduction (Pacific ocean) getting smaller - the difference in true north