science1

Question 1

What causes electrons to move?

Answer 1

Friction.

Question 2

What is friction in the context of charging objects?

Answer 2

The charging of two neutral objects made of different materials by rubbing them together.

Question 3

What happens when neutral objects of different materials are rubbed together?

Answer 3

Electrons are transferred from one object to the other, causing one to become negatively charged and the other positively charged.

Question 4

What is an example of friction in action?

Answer 4

Rubbing amber and fur together.

Question 5

What happens to the fur and amber when rubbed together?

Answer 5

The fur becomes positively charged and the amber becomes negatively charged.

Question 6

What does the force of friction do?

Answer 6

Removes electrons from one object and transfers them to another.

Question 7

What remains constant during the charging process?

Answer 7

No electrons are lost, they just move.

Question 8

Do protons and neutrons move during the charging process?

Answer 8

No, protons and neutrons never move.

Question 9

What is electron affinity?

Answer 9

The tendency of a substance to hold onto electrons.

Question 10

How does the periodic table relate to electron affinity?

Answer 10

The further up and to the right the periodic table goes, the higher the electron affinity.

Question 11

What is a neutral object?

Answer 11

An object that has the same number of protons as electrons.

Question 12

What happens when a neutral object obtains extra electrons?

Answer 12

The object becomes negatively charged.

Question 13

What happens when a neutral object loses electrons?

Answer 13

The object becomes positively charged.

Question 14

What is electric charge?

Answer 14

Charged particles that exert an electric force on each other.

Question 15

What is static electricity?

Answer 15

The build-up of electrons on an object.

Question 16

What is current electricity?

Answer 16

The movement of electrons through a conducting material.

Question 17

What is a conductor?

Answer 17

A material that allows electrons to move freely through it.

Question 18

What are examples of conductors?

Answer 18

Copper, aluminum, iron.

Question 19

What is an insulator?

Answer 19

A material that resists or blocks the movement of electrons.

Question 20

What are examples of insulators?

Answer 20

Wood, glass, plastic, rubber.

Question 21

What is a fair conductor?

Answer 21

A material that allows some movement of electrons but not as freely as in a conductor.

Question 22

What are examples of fair conductors?

Answer 22

Carbon, human body, soil.

Question 23

What do particles with opposite charges do?

Answer 23

Attract each other.

Question 24

What do particles with the same charges do?

Answer 24

Repel each other.

Question 25

What is Coulomb's law?

Answer 25

The law that describes the attraction and repulsion of charged particles.

Question 26

What does 1 Coulomb equal?

Answer 26

6.24 X 10^18 electrons added to or removed from a neutral unit.

Question 27

What is conductivity?

Answer 27

The ability of materials to allow electrons to move freely in them.

Question 28

What three categories can materials be grouped into based on conductivity?

Answer 28

* Conductor * Fair conductor * Electrical insulator.

Question 29

What did Charles-Augustin de Coulomb discover?

Answer 29

The attraction or repulsion between charged objects increases as they are brought closer together.

Question 30

Give an example of materials with different electron affinities.

Answer 30

Rubbing nylon and steel together.

Question 31

What happens when nylon and steel are rubbed together?

Answer 31

Nylon becomes positive and steel becomes negative.