Electrical Energy

Which of the following materials would be a poor conductor of electricity?

• A. aluminum
• B. copper
• C. rubber
• D. steel

Heat flows in which direction?

• A. from solid objects to liquids
• B. from larger objects to smaller objects
• C. from warmer objects to cooler objects
• D. from more dense objects to less dense objects

Tags

NGSS.MS-PS1-4

Megan wants to determine if an electrical circuit has electricity flowing through it. Which of the following evidence is proof that the circuit has an electrical current?

• A. The circuit is a closed loop
• B. A light bulb is lit in the circuit
• C. The circuit’s switch is in the closed position
• D. Wires in the circuit are made of conducting material

A student is investigating what happens when objects with electrical charges are brought near each other without touching. In which of the following pairs of partnered objects will the objects move away from each other?

• A. 1 and 3
• B. 1 and 4
• C. 2 and 3
• D. 2 and 4

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Which circuit allows for the flow of energy through the entire circuit?

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Jessica sets up a simple circuit. She observes that the light bulb does not light. Which action will most likely cause the light bulb to light?

• A. closing the switch
• B. using a different battery
• C. removing one of the wires
• D. changing the positions of the wires

Tags

NGSS.MS-ETS1-1

The image shows a simple electric circuit. It includes a cube made of an unknown material. The light bulb glows brightly when the circuit is completed. Which material is the cube most likely made of?

• A. glass
• B. rubber
• C. steel
• D. wood

Tags

NGSS.MS-PS2-3

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 student is taking laundry out of the dryer. He notices that a sock and a sweater are stuck together. Which statement is the most likely reason the sock was stuck to the sweater?

• A. The sock and the sweater have opposite charges.
• B. The sock and the sweater have changing charges.
• C. Both the sock and the sweater have a neutral charge.
• D. Both the sock and the sweater have a neutral charge.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

After rubbing a balloon on her head, Alexis could see her hair lifting up to the balloon. Her teacher said that this is an example of creating opposite charges through static electricity. Which of these is another example of static charges and forces of attraction?

• someone using a leaf blower to push leaves off the sidewalk
• someone using a light to keep their food warm after it has been cooked
• someone using a clothes dryer and finding socks sticking to other clothes
• someone using opposite ends of magnetic bars so they move together