Magnetism and Electricity Review

Question 1

What is a natural form of electricity?

Answer 1

lightening

Question 2

Atoms consist of

Answer 2

electrons, protons and neutrons

Question 3

What makes up a nucleus

Answer 3

protons and neutrons

Question 4

The electrical charge for a neutron is

Answer 4

it has no charge

Question 5

What charge has the negative

Answer 5

electrons

Question 6

What kind of charge does a proton have?

Answer 6

positive charge

Question 7

If two charged objects are attracted to each other, what are their charges?

Answer 7

one is positive and one is negative

Question 8

If two charged objects are repelling one another, what are their charges?

Answer 8

the same (- and -) or (+ and +)

Question 9

A naturally magnetized iron ore is called

Answer 9

a lode stone

Question 10

electromagnets are made by

Answer 10

electricity passing through a coil of wire which produces a field of magnetism around the wire

Question 11

Magnetic fields surround….

Answer 11

magnets

Question 12

Electricity flows easily through

Answer 12

conductors

Question 13

Electricity does not flow through

Answer 13

insulators

Question 14

What is a resistor?

Answer 14

slows down the flow of electricity

Question 15

Why does a compass needle move when connected to a circuit?

Answer 15

Because the circuit produces a magnetic field

Question 16

What is the one thing you are allowed to change in a controlled experiment?

Answer 16

manipulated variable (changed variable)

Question 17

A short circuit will cause

Answer 17

the wire to overheat

Question 18

To make a bulb glow brighter you can

Answer 18

add more batteries

Question 19

a control device in an electric circuit is called

Answer 19

a switch

Question 20

a resistor is also known as a

Answer 20

semi conductor

Question 21

electrical use is measured in

Answer 21

kWh (kilowatt hours)

Question 22

How can we use electricity wisely?

Answer 22

By turning off the lights in rooms that your aren’t in

Question 23

Insulation in our walls and roof is important because

Answer 23

Because insulation keeps warmth in the house

Question 24

Why is solar energy a good choice?

Answer 24

Because you are using the sun to produce electricity which is more natural