WorksheetsScience topic 3 2023
Total questions: 21
Worksheet time: 16mins
1.Benny’s family bought a new electric stove. The stovetop had several large circles on it. When Benny’s father turned on the stove, the circles glowed with a red color. What can you infer about these circles?
A. The circles gave off both heat and light.
B. The circles gave off only light to show where to place the pans.
C. The circles gave off light but not heat.
D. The circles gave off light to help the cook see the stove.
Alex turned on the light in his room so he could do his homework. What type of energy transformation is taking place in Alex’s room?
A. electrical to light
B. light to mechanical
C. mechanical to heat
D. heat to electrical
Which useful energy transformation occurs in the toaster?
A. heat to sound
B. electrical to heat
C. heat to electrical
D. sound to mechanical
A student turns on a light bulb. Which energy transformation takes place in the light bulb?
A. electrical to light
B. light to electrical
C. electrical to mechanical
D. mechanical to electrical
What happens when an electric keyboard is played?
A. Light energy is transformed into electrical energy.
B. Electrical energy is transformed into sound energy.
C. Motion is transformed into electrical energy.
D. Sound energy is transformed into motion.
When you use an electric fan to cool down, the electrical energy is mainly transformed into what type of energy?
A. heat
B. light
C. motion
D. sound
Which of the following items would be the BEST conductor of heat?
A. A plastic spoon
B. An oven mitt
C. A wooden board
D. A metal pan
Which of these best describes why many electrical wires have plastic coatings on them?
A. Plastic conducts electricity, so it helps the electricity flow through the wire.
B. Plastic does not conduct electricity, so it helps the electricity flow through the wire.
C. Plastic conducts electricity, so it keeps a person from getting shocked when handling the wire.
D. Plastic does not conduct electricity, so it keeps a person from getting shocked when handling the wire.
A ladder made of which material would be the most dangerous to use if someone were working around power lines?
A. fiberglass
B. metal
C. plastic
D. wood
Which is true?
A. Insulators easily conduct electricity.
B. Conductors block the flow of electricity.
C. Insulators allow current to flow through them.
D. Conductors allow electrons to flow through them.
If you added ice cubes to a glass of water, which of the following would happen?
A. The heat from the glass would flow to the ice.
B. The heat from the ice would flow to the water.
C. The heat from the air outside the glass would flow to the water.
D. The heat from the water would flow to the ice.
It was a hot, sunny day. Marsha’s family was at the beach. Marsha took off her sandals and headed for the water. The sand was so hot, she had to run so her feet would not burn. Which of the following best explains why the sand was so hot?
A. People running in the sand made the sand hot.
B. Heat and light from the Sun made the sand hot.
C. Wind blowing over the sand made the sand hot.
D. The temperature that day made the sand hot.
The electric meter at Karen’s house measures the amount of electricity her family uses each month. Last month, her family installed a solar water heater. They no longer use electricity to heat their water. Which of the following can Karen’s family predict?
A. Their water bill will go up.
B. Their electric bill will go up.
C. Their electric bill will go down.
D. Their water bill will go down.
What would cause two balloons to repel?
one is positive and one is negative
both balloons are positive
both balloons are super charged
one balloon is positive and one is super charged
Why is electrical wiring usually made from copper?
Because copper is shiny
Because copper conducts electricity
Because copper is not magnetic
Because copper insulate electricity
To complete the circuit, a wire should be placed from —
The girl's hair and the balloons have....
like charges
no charges
unlike charges
