Magnetism and Electricity

Test Game

5 Point Questions

First question is for your

# 4s

# 1 Becky holds a magnet near an object on a table and observes that the object moves away from the magnet she holds. What can you conclude from this observation?

A. The object must be a magnet.B. The object is not a magnet, but could

be made of iron or nickel.C. The object is not a magnet, but could be

made of aluminum or copper.D. The object could be made of plastic or

wood

# 1 Answer: Becky holds a magnet near an object on a table and observes that the object moves away from the magnet she holds. What can you conclude from this observation?

A. The object must be a magnet.B. The object is not a magnet, but could

be made of iron or nickel.C. The object is not a magnet, but could be

made of aluminum or copper.D. The object could be made of plastic or

wood

# 3s…….You are up!

# 2 What would the evidence be if two LIKE (or Same) charged objects (either both positive or both negative) interacted?

A. one object moves away from the other

B. one object moves toward the other

C. neither repel nor attract

D. There is not enough information to answer the question.

# 2 Answer: What would the evidence be if two LIKE (or Same) charged objects (either both positive or both negative) interacted? *Charged = Static E.A. one object moves away from the other *Repels!

B. one object moves toward the other

C. neither repel nor attract

D. There is not enough information to answer the question.

# 2s….your turn

# 3Electrically charged (unbalanced) objects

A.neither repel nor attract uncharged objects

B.can attract uncharged objects

C.can repel uncharged objects

D.There is not enough information to answer the question.

# 3 AnswerElectrically charged (unbalanced) objects (Bob—Static Electricity=

Charged)

A.neither repel nor attract uncharged objects

B.can attract uncharged objects *Remember the foil/paper pieces and can from Bob and Fred?

C.can repel uncharged objects

D.There is not enough information to answer the question.

# 1s…..you’re up.

***Do you know

• What charged atoms are called?

• What are they called if they are negatively charged?

• Positively charged?

# 4

Magnets

A.attract nearly all metal objects

B.neither repel nor attract metal objects

C.attract some metals objects

D.There is not enough information to answer the question.

# 4 Answer

Magnets

A.attract nearly all metal objects

B.neither repel nor attract metal objects

C.attract some metals objects *Only those that are Ferromagnetic (contain iron).

D.There is not enough information to answer the question.

# 3s ….you’re up next

# 5 To make an electromagnet you could

A. electrically charge a magnet by rubbing it with a piece of cloth.

B. magnetize an electrically charged object by rubbing it with a piece of cloth.

C. connect a magnet in a closed electric circuit with a battery

D. connect a magnetic material in a closed electric circuit with a battery.

E. coil a wire around magnetic material and connect it in a closed circuit with a battery.

# 5 Answer To make an electromagnet you could

A. electrically charge a magnet by rubbing it with a piece of cloth.

B. magnetize an electrically charged object by rubbing it with a piece of cloth.

C. connect a magnet in a closed electric circuit with a battery

D. connect a magnetic material in a closed electric circuit with a battery.

E. coil a wire around magnetic material and connect it in a closed circuit with a battery. *You need a GOOD conductor (wire) surrounding a ferromagnetic material.

# 1s…..you’re up next

# 6 A hypothesis must contain or strongly imply

which of the following?

A. Only the Test/independent variable

B.Only the Outcome/dependent variable

C.Both the Test and Outcome variables

D.Both the Test and Outcome variables, as well as the constants

# 6 AnswerA hypothesis must contain or strongly imply

which of the following?

A. Only the Test/independent variable

B.Only the Outcome/dependent variable

C.Both the Test and Outcome variables

D.Both the Test and Outcome variables, as well as the constants

#4s You’re up.

# 7

If the number of cells is increased, then the brightness of the bulbs will increase.

What is my Test variable?

What is my Outcome variable?

# 7 Answer

If the number of cells is increased, then the brightness of the bulbs will increase.

What is my test variable? *The Number of Cells

What is my outcome variable?

*The Brightness of the Bulbs

10 Point Questions

1st question is for your # 2s

# 1 Three different circuits were set up during the experiment and each circuit had a battery, an ammeter, and one or more bulbs. All bulbs were identical.

What is the test/independent/manipulating variable?

Name 3 constants.

# 1 Answer Three different circuits were set up during the experiment and each circuit had a battery, an ammeter, and one or more bulbs. All bulbs were identical.

What is the test/independent/manipulating variable? # of Bulbs

Name 3 constants. Battery (brand, size, voltage), ammeter, bulb (brand, size wattage), type of wire, circuit type (series/parallel), battery holder, bulb holder

# 1s you are up!

# 2 Categorize the following objects into Magnet, Ferromagnetic Material, or Neither by using the letter:

Magnet Ferromagnetic Material

Neither

A B C D (nail) (Compass) (Aluminum Can) (Wrench)

E F G H

(Water) (Magnet) (Paperclip) (Copper wire)

# 2 Answers: Categorize the following objects into Magnet, Ferromagnetic Material, or Neither by using the letter:

Magnet Ferromagnetic Material

Neither

B G E

F D H

A C

**BUT E, H, and C are all # 3s—you’re up conductors of electricity!

#3 Match the following: (Write the word, followed by the letter of the definition it matches. Bonus 10 points if you can name all 3 units each is measured in.

Voltage Electric Current Resistance

A. Flow of electricity (how much or many negative charges or electrons are moving)

B. The amount of electric potential (the ability of the current to move—how forceful).

C. When the current flows through ANY material this slows it down

#3 Answer Match the following: (Write the word, followed by the letter of the definition it matches. Bonus 10 points if you can name all 3 units each is measured in.

Electric Current (A) Flow of electricity (how much or many negative charges or electrons are moving) *Measured in Amperes or mA

Voltage (B) The amount of electric potential (the ability of the current to move—how forceful). *Measured in Volts

Resistance (C) When the current flows through ANY material this slows it down *Measured in **# 2s—Your turn Ohms

#4Draw a parallel circuit and label the

parts. *Use the symbols and use only the BASIC components necessary for a circuit.

#4 AnswerDraw a parallel circuit and label the

parts.

OR

# 4s…..Your turn.

What is the difference between a conductor and an insulator? Give an example of each.

# 5

What is the difference between a conductor and an insulator? Give an example of each.

Conductor: A substances that allows the flow of electricity (allow electrons to flow easily).

Example: Copper, Aluminum (metals)

Insulator: A substance that resists the flow of electricity (does not allow electrons to flow easily).

Example: Rubber, Paper, Plastic

# 3s….you are up

# 5 Answer

A student holds a magnet near a compass and observes that the red part of the needle turns towards the magnet. The student decided to turn the magnet over. What will happen to the red part of the needle? Explain why!

# 6

A student holds a magnet near a compass and observes that the red part of the needle turns towards the magnet. The student decided to turn the magnet over. What will happen to the red part of the needle? Why?

It will turn away from the magnet or REPEL the magnet. This is because the compass needle is also a magnet and if one side of the magnet attracted the needle, then the other side of the magnet is the same pole, so it will repel. Opposites attract and likes repel with MAGNETS.

# 1s….you are up

# 6 Answer

#7

If a circuit has a voltage of 15.2 (V) and a current of 7.4 amperes (I), what is the resistance (R)? Show your work. *Round to the nearest 10th.

#7 Answer

If a circuit has a voltage of 15.2 (V) and a current of 7.4 amperes (I), what is the resistance (R)? Show your work. *Round to the nearest 10th.

R = V ÷ I

2.1 = 15.2 ÷ 7.4

Resistance = 2.1 Ohms

BONUS 10 points CHOICE group member.Name 3 variables that can affect an

electromagnet’s strength?

BONUS 10 points CHOICE group member.Name 3 variables that can affect an

electromagnet’s strength?Amount of coils around the nail

Size of nail

Size of cell

Amount of cells

Thickness of wire

20 Point Questions

1st Question is for your 4s

#1

Explain the difference between a series circuit and a parallel circuit.

#1 AnswerExplain the difference between a series circuit and a

parallel circuit.

In a series circuit, all of the components are in ONE loop. Opening this type of circuit (broken bulb, bad connection, etc.) will result in the entire circuit not working. Also, each device has to SHARE the electric current in that ONE loop.

In a parallel circuit, each electrical device has its OWN loop; its own path to the source (battery). Even if one loop is broken(or open) in a parallel circuit, the electricity continues to flow in the other closed loop. Also, each device gets its OWN electric current…no sharing!

# 2s….you are up

25 Point Question

FOR THE GROUP

Three different circuits were set up during the experiment and each circuit had a bulb, an ammeter (to measure electric current), and one or more cells (C-cell). All cells were identical. The experiment will show the relationship between the number of batteries and the amount of electric current in a circuit.

Part A: Write a hypothesis for this experiment.

Number of cells

Amount of electric current (mA)

1 42

2 65

3 80

Part B: Below is the data table from the experiment.

Now that you see the data, write a conclusion for the results. Don’t forget to address your hypothesis.

Three different circuits were set up during the experiment and each circuit had a bulb, an ammeter (to measure electric current), and one or more cells (C-cell). All cells were identical. The experiment will show the relationship between the number of batteries and the amount of electric current in a circuit.

Part A: Write a hypothesis for this experiment.

Test V.= # of cellsOutcome V. = amount of electric current

(measured in milliamperes)Hypothesis Example: If the number of cells in a

circuit increases, then the amount of electric current will increase because there will be more voltage to pull from in the circuit.

My hypothesis, If the number of cells in a circuit increases, then theamount of electric current will increase because more voltage to pull from , was supported. My evidence is that when my circuit

contained 1 cell the amount of electric current running through the circuit was 42 mA. When I increased to 2 cells and then to 3 cells, the electric current also increased to 65 mA and then to 80 mA.

***Notice, this conclusion restated my hypothesis, said whether or not it was supported, and then used ALL data as evidence.

Number of cells

Amount of electric current (mA)

1 42

2 65

3 80

Part B: Below is the data table from the experiment.Now that you see the data, write a conclusion for the results.

Don’t forget to address your hypothesis.

Bonus 10 points: What would this look like in a graph? --Set one up.

Number of cells

Amount of electric current (mA)

1 42

2 65

3 80

What would this look like in a graph? --Set one up.

Number of cells

Amount of electric current (mA)

1 42

2 65

3 80

How the number of cells affects the amount of electric current in a circuit

42

6580

020406080

100

1 2 3

Number of cells

Am

ount

of e

lect

ric

curr

ent (

mA

)

Do NOT forget that I told you I expect you to know how to use the simulator we used in class!