Unit 2 Test

Question 1

What is the highest point of the wave called

Answer 1

The crest

Question 2

What is a series circuit?

Answer 2

A circuit that only has one path for the electricity to flow.

Question 3

What is the center of an atom called?

Answer 3

The nucleus

Question 4

What is the lowest point of the wave called?

Answer 4

The trough

Question 5

Opposite poles…

Answer 5

Attract

Question 6

What is the distance between the resting position and the crest or the resting position and the trough called?

Answer 6

Amplitude

Question 7

Why are magnetic poles important for navigation?

Answer 7

A compass needle attracts to the Earth’s North Pole, so we can see North.

Question 8

What is an insulator?

Answer 8

A material that does NOT transfer energy easily

Question 9

Like poles…

Answer 9

Repel

Question 10

What is the unit of measurements for resistance?

Answer 10

Ohms

Question 11

What is an open circuit?`

Answer 11

A circuit that is not in a continuous path, that has an opening. This means that the electricity cannot flow.

Question 12

How can you increase an electromagnet?

Answer 12

Adding more coils, Tightening the coils, increasing the voltage of the battery.

Question 13

What are some examples of electromagnetic waves?

Answer 13

X-rays, gamma rays, radio waves

Question 14

What is the unit of measurements for currents?

Answer 14

Amps

Question 15

Why does rubbing a balloon on hair create static electricity?

Answer 15

The electrons transfer from one object to another, resulting in an imbalance of charges, causing static electricity.

Question 16

If an atom has 10 electrons and 8 protons, what is the overall charge?

Answer 16

Negative

Question 17

What is the charge of a proton?

Answer 17

positive

Question 18

What is the charge of a neutron?

Answer 18

neutral

Question 19

What is the unit of measurements for voltage?

Answer 19

Volts

Question 20

What is static electricity?

Answer 20

Static electricity is when there is an imbalance of positive and negative charges.

Question 21

Why is Earth like a magnet?

Answer 21

Earth has a North Pole and a South Pole.

Question 22

If a negatively charged item is brought near a neutrally charged item, what will happen?

Answer 22

The electrons will go to the neutrally charged item, and since both items will be negatively charged, they will repel.

Question 23

What are the two types of magnetic poles?

Answer 23

North Pole and South Pole

Question 24

What are the 3 main parts of an atom?

Answer 24

Protons, neutrons and electrons

Question 25

Why is it important to have resistance in a circuit?

Answer 25

So that there is not too much electrical energy, it could cause electrical fires.

Question 26

What happens if you add more light bulbs to a series circuit?

Answer 26

The additional lightbulbs create more resistance, resulting in dimmer lights.

Question 27

What type of circuit would you use to power a home lighting system?

Answer 27

A parallel circuit.

Question 28

What is a conductor?

Answer 28

A material that transfers energy easily.

Question 29

What is a closed circuit, and why is it necessary for electricity to flow?

Answer 29

A circuit with no open ends, it allows electricity to flow in a continuous path.

Question 30

What is the charge of an electron?

Answer 30

negative

Question 31

What is a parallel circuit?

Answer 31

A circuit that has more than one paths for the electricity to flow.

Question 32

What is the distance between trough to trough or crest to crest called?

Answer 32

Wavelength