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WorksheetsUnit 2 Review
Total questions: 20
Worksheet time: 43mins
Which two types of energy are being produced in the picture?
electrical and light energy
electrical and sound energy
mechanical and light energy
mechanical and sound energy
Which type of handle on a cooking pan can burn your hand?
Metal
Wood
Plastic
Rubber
Ms. Q kicks a soccer ball into the air. Which type of energy does the soccer ball have after its kicked?
Light
Sound
Electrical
Mechanical
Why did Juan have trouble moving the box in Mr. Wilson's room?
Juan's arms were too tired to continue moving the heavy box.
The box was pulled toward magnets in the carpet.
The carpet had more friction than the tile.
The weight of the box became greater over time.
Why would this circuit NOT work?
The wires were not connected to the negative side of the battery, so energy could not flow completely through the circuit.
Too many light bulbs were used, so one battery did not give off enough energy to flow completely through the circuit.
The battery was not turned on, so it could not send energy to the light bulbs at the end of the circuit.
The wires were not insulated, so the energy in the battery leaked out of the wires and did not carry through the whole circuit.
Many electrical wires are wrapped in rubber to prevent shocks or burns from the wires. Rubber is used for this purpose because it is a —
poor electrical and thermal conductor
good electrical and thermal conductor
good electrical conductor but poor thermal conductor
poor electrical conductor but good thermal conductor
Lesley's family went to the beach at night. When it was time to go home, Lesley's dad called Lesley's name and shined his flashlight at Lesley, who was far away. Lesley saw the light but did not hear her father's voice until he ran closer to her. What is the most likely reason for this?
Light energy can cancel out sound energy if it is bright enough.
Light energy travels faster than sound energy.
The sound waves were too high pitched to be heard.
The sound waves didn't have good conditions to travel through.
Jose is rewiring a lamp in his house. He wants to know why the wire inside the casing is made of copper. What would be the most likely reason?
Copper conducts electricity better than other metals.
Copper does not conduct electricity, so it is safe for wires.
Copper looks pretty when it is put inside the rubber casing.
Copper is the only material available for wires to be made of.
When ice skaters skate, the heat from their moving blades melts the ice underneath them. This speeds them up because it is reducing the amount of what?
Friction
Heat
Speed
Ice
When a lamp is plugged in and turned on —
electrical energy flows through the lamp, and the lamp gives off light energy, only.
mechanical energy flows through the lamp, and the lamp gives off light and sound energy.
mechanical energy flows through the lamp, and the lamp gives off electrical energy, only.
electrical energy flows through the lamp, and the lamp gives off light and thermal energy.
Which of the following substances is the best insulator?
Water
Copper
Aluminum
Air
Which of the following shows that an electric circuit was made correctly?
Electricity would flow through half of the circuit.
The temperature of the source of the circuit would go down.
The size of the source of the circuit would get bigger.
Electricity would flow through the whole circuit.
Why are tires made with deep treads like this one?
To increase the amount of friction so the car stays on the road.
To increase the amount of friction so the car moves faster.
To decrease the amount of friction so the car moves faster.
To decrease the amount of friction, so the car slides more easily.
Electrical energy is the flow of electrons. Which of the following systems will allow a continuous flow of energy?
Based on these results, object (a) is NOT a conductor since the bulb did NOT light up.
Mr. Gallardo flipped the "on" switch on his lamp, but it did not turn on. He realized it wasn't plugged in, so he plugged it into the wall, and the lamp suddenly worked. What did Mr. Gallardo do to make his lamp work?
By plugging in the lamp, he completed the circuit, allowing electricity to flow from the outlet.
By plugging in the lamp, he completed the circuit, stopping electricity from escaping the lamp.
By plugging in the lamp, he opened the circuit, allowing electricity to flow from the outlet.
By plugging in the lamp, he opened the circuit, stopping electricity from escaping the lamp.
Which of the following does NOT use a complete circuit?
A flashlight
A strike of lightning
A car headlight
A television
What type of energy is used to crush dried corn with a mortar and pestle?
Electrical
Light
Mechanical
Sound
The picture shows how far Juan's toy car went when he pushed it with the same amount of force on cement and on gravel.
As Juan pushed his toy car forward, the gravel pushed against the car more than the cement did.
As Juan pushed his toy car forward, the gravel pushed against the car less than the cement did.
As Juan pushed his toy car forward, the gravel pulled the car forward more than the cement did.
As Juan pushed his toy car forward, the gravel pulled the car forward less than the cement did.
Using 3-5 complete sentences, explain the conditions in which electricity will flow through an electric circuit.
