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3rd-4th Grade Science Unit D Chapter 3 Electricity At Work
Test Description: Electricity at Work
Instructions: Answer all questions to get your test result.
1) A batter is made up of two or more ________________.
A
electric cells.
B
voltage.
C
electromagnetics.
D
generators.
2) _________________ produce the electricity that you use in your home and school.
A
Solar cells
B
Electromagnetics
C
Generators
D
Voltage
3) ______________________ change the Sun's energy into electrical energy.
A
Voltage
B
Solar cells
C
Generators
D
Electrical cells
4) The force that pushes electricity along wires is _______________.
A
solar cells.
B
electromagnets.
C
generators.
D
voltage.
5) Electricity sets up a magnetic field around ___________________.
A
electric cells.
B
electromagnets.
C
generators.
D
solar cells.
6) How does a battery create current?
A
Energy of motion changes into electrical energy.
B
Electrical energy changes into chemical energy.
C
Chemical energy changes into energy of motion.
D
Chemical energy changes into electrical energy.
7) Brownie is a volunteer at a recycling center. Her job is to separate steel cans from aluminum cans. What device might make her job easier?
A
transfromer
B
current detector
C
generator
D
electromagnet
8) Before Emily plugged in the cord of her study lamp, she noticed the insulation on the cord was worm out. What should she do?
A
Be sure she hold the plug when pulling it from the outlet.
B
Plug in the cord, since she'll only be using the lamp for a short time.
C
Not plug in the cord until it's repaired, or buy a new lamp.
D
Plug the cord into an outlet with a number of other cords plugged in it.
9) Which of the following comparisons can you use to best explain voltage?
A
lemon juice in a glass
B
a compass needle
C
fire in a fireplace
D
water in a garden hose
10) If a large electromagnet is used in a junk yard, what happens if the electromagnet is turned off?
A
It becomes magnetic, dropping many materials.
B
It loses it's magnetism, dropping many materials.
C
It loses it's magnetism, attracting many materials.
D
It becomes magnetic, attracting many materials.
*select an answer for all questions
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