Chapter 19 test cards

Question 1

What is a magnet?

Answer 1

Any material that attracts iron and materials that contain iron

Question 2

Where is the magnetic force strongest?

Answer 2

At the magnetic poles

Question 3

What do magnetic poles that are unlike each other do?

Answer 3

Attract

Question 4

What do magnetic poles that are like each other do?

Answer 4

Repel

Question 5

What is the area of magnetic force around a magnet?

Answer 5

Magnetic field

Question 6

What are magnetic field lines?

Answer 6

Lines that map out the magnetic field around a magnet

Question 7

What is the path of a magnetic field line?

Answer 7

They spread out form one pole, curve around the magnet , and return to the other pole.

Question 8

What do magnets attract?

Answer 8

Iron and materials that contain iron

Question 9

Which end of a magnet always swings freely?

Answer 9

The north pole

Question 10

What is the center region of an atom?

Answer 10

The nucleus

Question 11

What is the smallest particle of an element?

Answer 11

An atom

Question 12

What is a magnetic domain?

Answer 12

A grouping of atoms that have their magnetic fields lined up in the same direction.

Question 13

What is a ferromagnetic material?

Answer 13

A material that shows strong magnetic properties

Question 14

What is a magnet made from a material that keeps its magnetism for a long time?

Answer 14

A permanent magnet

Question 15

True or False
Heating a magnet will destroy its magnetism

Answer 15

True

Question 16

True or False
If a magnet is broken in two the result is a destroyed magnet

Answer 16

False

Question 17

True or False
Each smaller magnet has its own north pole and south pole

Answer 17

True

Question 18

What magnet does earth represent?

Answer 18

A bar magnet

Question 19

True or False
The geographic and magnetic poles are at the same location

Answer 19

False

Question 20

True or False
Magnetic declination changes over time

Answer 20

True

Question 21

What does Earth’s magnetic field affect?

Answer 21

The movements of electrically charged particles in space

Question 22

What affects earth’s magnetic field?

Answer 22

The particles

Question 23

What are the Van Allen Belts?

Answer 23

Two doughnut shaped regions that contain electrons and protons traveling at very high speeds

Question 24

How far above earth’s surface is the Van Allen belt?

Answer 24

Between 1,000 and 25,000 kilometers

Question 25

What pushes against Earth's magnetic field?

Answer 25

The solar winds

Question 26

What is the region of Earth's magnetic field shaped by the solar wind called?

Answer 26

The magnetosphere

Question 27

What is an aurora?

Answer 27

A glowing region in earth's atmosphere caused by charged particles from the sun

Question 28

What are 3 properties magnets have?

Answer 28

Magnets attract iron and materials that contain iron, magnets attract or repel other magnets, and one part of a magnet will always point north when allowed to swing freely

Question 29

What is the difference between protons and electrons?

Answer 29

Protons are particles you can find on the inside of a nucleus and have a positive charge. Electrons are particles that have a negative charge and are found on the outside of the nucleus

Question 30

What is a magnetic domain?

Answer 30

A grouping of atoms that have their magnetic fields aligned

Question 31

What are the four common ferromagnetic materials found in nature?

Answer 31

Iron, nickel, cobalt, and gadolinium.

Question 32

What do the Van Allen Belts contain?

Answer 32

electrons and protons traveling at very high speeds.