Download Insulator

1.
Kim wanted toast for breakfast. When she turned on the toaster switch, electricity was
transformed into what type of energy?
A.
B.
C.
D.
2.
sound and heat energy
magnetic and light energy
light and heat energy
heat energy
Look at each picture. Decide if the bulb would be on or off.
_____________
_____________
_____________
Add one wire to the correct location to complete each circuit.
-
+
_____________
3.
Bill and Jenny put together a circuit, but the bulb did not work. Tell two things they can check
to try to fix the circuit.
4.
David and Meg made a circuit that did not light. Look at the picture. Explain what needs to
be changed to make the bulb light.
5.
Here is a picture of a circuit.
Using the symbols for the battery, the bulb, and the wire listed below, draw a circuit diagram
for this circuit.
Bulb
Battery
Wire
6.
Copper wire in a circuit _____________________ electricity.
A.
B.
C.
D.
insulates
resists
conducts
repels
7.
Read each item. Write it under the correct heading.
marble
paper clip
plastic button
chalk
Insulator
aluminum foil
nail
Conductor
8.
Study each picture. Label each circuit as series or parallel.
9.
Ann’s mother bought some new lights for the Christmas tree. One bulb stopped working, but
all the other bulbs continued to light up. What kind of circuit was there in the string of
lights?
A.
B.
C.
D.
series
parallel
double
open
10.
Write 2 safety rules to follow when using electricity.
11.
Look at the picture below. Explain what will happen when the boy enters a dark room and
flips the light switch. What type of energy will be created?
12.
Circle the complete circuit and explain what makes it a complete circuit.
Circuit A
Circuit B
13.
A useful device for opening or closing a circuit is ________________________.
A.
B.
C.
D.
an insulator
a battery charger
a switch
conductor
14.
Does the following circuit diagram show a complete circuit? Justify your response.
15.
Give two ways your teacher uses electricity in the classroom.
Use the following diagram to answer question 17.
Bulb 1
6 Volt
Battery
Bulb 3
Bulb 2
16.
What will occur when the switch is closed?
A.
B.
C.
D.
17.
Only Bulb 1 will light up.
No bulbs will light up.
Only Bulb 1 and Bulb 3 will light up.
Bulb 1, Bulb 2, and Bulb 3 will light up.
This table shows the results of a student’s investigation.
Group A
paper
plastic straw
marble
rubber
Group B
paper clip
copper wire
iron nail
metal screen
What criteria did the student use to classify the materials?
A.
B.
C.
D.
conductor/insulator
series/insulator
insulator/conductor
conductor/resister
18.
The following diagrams show a flashlight circuit with a battery and a bulb connected by wires
to various substances. In which diagram will the bulb light?
Diagram A
Bulb
Air
Diagram B
Bulb
iron nail
Diagram C
Bulb
plastic button
Diagram D
Bulb
rubber block
A.
B.
C.
D.
Diagram
Diagram
Diagram
Diagram
A
B
C
D
Identify each of the statements as qualitative observation, quantitative observation,
prediction, or inference.
1.
An electromagnet that uses a AA battery is weaker than one that uses D battery.
2.
The wire coils are in the shape of a spiral.
3.
We had ten wraps of the wire on our electromagnet.
4.
If we add more wraps, the electromagnet will be stronger.
5.
The battery is in the shape of a cylinder.
6.
The motor in a small toy stopped working. The battery probably went dead.
Identify each of the following as manipulated variable, responding variable, or controlled
variable.
7.
Three “D” batteries were used in each electromagnet.
8.
Three different sized nails were used.
9.
My electromagnet with the small nail picked up 3 paper clips.
10. We wrapped the nail 10 times for each trial.
11.
On our third set of trials, the iron core had 30 coils of wire around it.
12. An electromagnet for a large machine would probably have thousands of coils of wire.
13. The paper clips used in the trials weigh approximately 1 gram each.
14. When I go home I will probably try this experiment using more coils to see if the electromagnet
continues to get stronger.
15. The silver paper clips are shiny.
16. The electromagnet was probably discovered by someone trying to find new ways to use
electricity.
Identify each of the following as manipulated variable, responding variable, or controlled
variable.
17. The number of wraps or coils on the iron core changed as we conducted our experiment.
18. We used three D batteries for each electromagnet.
19. Each team had to use the same size and type of paper clips in this investigation.
20. The nail wrapped 20 times was able to pick up 7 paper clips.
1.
Complete the chart by placing the following items under the correct heading: iron nail, penny,
wooden ruler, plastic cup, rubber ball, aluminum can, paper clip, chalk, iron filings
Magnetic
2.
Non-Magnetic
Your teacher asks you to create an electromagnet. List what materials you would need. Draw
how you would put these materials together to make an electromagnet. Label your drawing.
Materials needed:
Drawing with Labels:
3.
The north pole of one magnet is facing the south pole of another magnet. The two magnets
will _______________.
A.
B.
C.
4.
Electromagnetism is _______________.
A.
B.
C.
D.
5.
attract each other
repel each other
have no effect on each other
magnetism
magnetism
magnetism
magnetism
by
by
by
by
electrical storms.
a large magnet.
an electrical current.
a ring magnet
Tom has two magnets. On one of the magnets, the south and north poles are labeled.
Explain how Tom can determine the north pole and the south pole on the other unlabeled
magnet.
N
6.
produced
produced
produced
produced
S
?
?
Which of the following will increase an electromagnet’s strength?
A.
B.
C.
D.
using a shorter wire
increasing the number of batteries
decreasing the number of batteries
decreasing the number of coils
7.
Explain the difference between a magnet and an electromagnet?
8.
Explain which locations on the bar magnet would have the greatest magnetic strength.
9.
Which set of magnets will be attracted to each other?
A.
N
N
B.
N
S
C.
S
S
D.
N
W
10.
Andrew lost the tiny metal screw out of his glasses while doing an experiment outside in the
sand. Circle which of these tools will do the best job of helping him find the screw?
11.
Look at the two electromagnets below. What can you determine about each electromagnet’s
strength?
A.
A.
B.
C.
D.
B.
Electromagnet A is the strongest and B is the weakest.
Electromagnet A is the weakest and B is the strongest.
Both electromagnets have equal strength.
Neither electromagnet has magnetic strength.