Science Unit test review

Question 1

State the “Law of Attraction and Repulsion” (Law of Electrostatics).

Answer 1

Like charges repel
Unlike charges attract
Opposite charges attract

Question 2

What type of charge does something get when it’s charged by contact?

Answer 2

It gets positively charged

Question 3

A negatively charged rod is brought CLOSE to a neutral pith ball.

A negatively charged rod is brought CLOSE to a negative pith ball.

A negatively charged rod is brought CLOSE to a positive pith ball.

A negative rod TOUCHES a neutral pith ball.

A positive rod TOUCHES a neutral pith ball.

Answer 3

Attract

Repel

Attract

Attract

Repel

Question 4

You are outside when a thunderstorm erupts. Name 3 things that you can do to avoid being hit by lightning.

Answer 4

Avoid water
Don’t touch metal stuff
Don’t lie flat on the ground

Question 5

Why are fuses and circuit breakers installed in electric circuits in your home?

Answer 5

To prevent an overload of electricity in your house or a short circuit.

Question 6

Describe and give an example of the FOUR basic parts of an electric circuit. Practice drawing circuit diagrams by making quizzes for your peers!

Answer 6

Battery
Switch
Lightbulbs
Wires

Question 7

Formula’s for Ohm’s law

Answer 7

V= IxR
R = V/I
I = V/R