science test chapter 6

Question 1

What is static electricity?

Answer 1

a buildup of excess electric charge

Question 2

What exerts the force that causes other electric charges to move?

Answer 2

the electric field

Question 3

The law of conservation of charge states that _____.

Answer 3

electric charge is not created or destroyed

Question 4

Elements that are shiny and good conductors of electricity are _____.

Answer 4

Metals

Question 5

The negatively charged particles in an atom are called _____.

Answer 5

electrons

Question 6

Positive charges flow from _____.

Answer 6

high-voltage areas to low-voltage areas

Question 7

______ is related to the push that causes charges to move.

Answer 7

voltage difference

Question 8

A(n) _____ is a closed, conducting path.

Answer 8

circuit

Question 9

____ is the tendency for a material to oppose the flow of electrons.

Answer 9

Resistance

Question 10

In which type of circuit does charge have only one loop to flow through?

Answer 10

Series

Question 11

In which type of circuit are there two or more branches for charge to move through?

Answer 11

Parallel

Question 12

What is the standard voltage difference of electrical energy entering homes in the United States?

Answer 12

120 V

Question 13

The purpose of fuses and circuit breakers is to _____.

Answer 13

prevent circuits from overheating

Question 14

The rate at which electrical energy is converted to another form of energy is called _____.

Answer 14

electrical power

Question 15

According to Ohm’s law, as the resistance in a circuit _______, the current _______.

Answer 15

increases, decreases

Question 16

The process of transferring charge by touching is called _______.

Answer 16

charging by contact

Question 17

Electric current in a circuit is measured in _______.

Answer 17

Amperes

Question 18

Why are metals good conductors of electricity?

Answer 18

Outer-level electrons are weakly held.

Question 19

What is the current in a circuit if the voltage difference is 15 V and the resistance is 15 Ω?

Answer 19

1.0A

Question 20

Which of these is necessary in order to make an electric circuit?

Answer 20

a closed path

Question 21

The electrical energy used in your house is usually measured in units of _____.

Answer 21

kilowatt hours

Question 22

When one lightbulb in a string of bulbs wired as a series circuit burns out, _____.

Answer 22

all the lights go out

Question 23

Electrical devices have resistance because they _______.

Answer 23

convert some electrical energy into thermal energy

Question 24

Which of the following statements about electrical charge is true?

Answer 24

Electrical forces act at a distance.

Question 25

Static Charge

Answer 25

the buildup of electric charge on an object

Question 26

Law of Conservation of Charge

Answer 26

charge can be transferred, but not created or destroyed

Question 27

Electric Field

Answer 27

a region of force around an electric charge within which other charges are attracted or repelled

Question 28

Conductor

Answer 28

a material in which electrons are able to move easily

Question 29

Insulator

Answer 29

a material in which electrons are not able to move easily

Question 30

Charging by Contact

Answer 30

the process of transferring charge by touching or rubbing

Question 31

Charging by Induction

Answer 31

electrons on a neutral object are moved by a charged object

Question 32

Electroscope

Answer 32

a device that detects electric charge

Question 33

Electric Current

Answer 33

Rate of movement of electric charges

Question 34

Voltage Difference

Answer 34

The force that causes electric charges to flow

Question 35

Electric Circuit

Answer 35

a closed path that electric current follows

Question 36

Resistance

Answer 36

Tendency for a material to oppose the flow of electrons

Question 37

Ohm’s Law

Answer 37

Current in a circuit equals voltage difference divided by resistance

Question 38

Series Circuit

Answer 38

circuit in which the current has only one loop to flow through

Question 39

Parallel Circuit

Answer 39

circuit in which the current has two or more branches to flow through

Question 40

Electrical Power

Answer 40

the rate at which electrical energy is converted to another form of energy