Forms of Energy Review

Which of the following best describes a conductor?

• A type of material that speeds up transfer of heat or electricity

• A type of material that slows down the transfer of heat or electricity

• The source of power in electricity

• Heat

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Which of the following groups of items are best classified as materials that are conductors?

• Popsicle stick, clothespin, pencil lead

• Rubber tube, plastic straw, iron nail

• iron nail, metal pan, copper wire

• toothpick, pencil, safety pin

As you plug in your laptop charger, you notice the cord is covered with plastic. Which of the following is the most likely reason for the wire to have plastic covering?

• The plastic transforms light energy to electrical energy.

• To protect people from the electricity in the wires, the plastic insulator is used.

• The plastic is a conductor and transfers electricity from the power source to the power receiver.

• To protect wires from damage, the plastic is used.

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You are attempting to create a circuit and have attached your battery (power source) via wire to two light bulbs. Neither light bulb is lighting up, however. Which of the following steps will most likely correct your circuit?

• Remove one wire and its attached lightbulb.

• Add a wire between the lightbulbs.

• Change the battery; it isn't working because the battery is not charger.

• Change the wires to attach to the positive side of the circuit.

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Which of the following is false about circuits?

• A closed circuit is a complete loop and has no breaks.

• A closed circuit is required to property provide power to a power receiver.

• An open circuit has a gap or break.

• An open circuit can light a lightbulb.

We often use switches to turn off lights. What role do switches play in circuits?

• A switch can be used to close a circuit (for example, to turn on a light) or to open a circuit (for example, to turn off a light).

• A switch cannot be used in a circuit.

• A switch can move wire positions.

• A switch can provide a different source of power by providing a power backup.

You remove your hat when you enter the classroom and your hair stands up, attracted to the hat. Which of the following best explains why?

• The hair is still connected to the hat because it is made of a sticky material.

• The hair is transferring energy into the hat.

• The hat and hair have opposite charges.

• The hair and the hat have the same charge.

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You are baking a cake in the oven at your home. Baking requires heat energy that is most likely transformed from what form of energy?

• Sound

• Light

• Mechanical

• Electrical

Tags

NGSS.MS-PS3-5

You are playing kick ball at recess. The ball is rolled to you and you kick it. What form of energy is used to kick the ball?

• Light

• Heat

• Mechanical

• Sound

Tags

NGSS.MS-PS3-5

NGSS.MS-PS3-1

Which of the following is not an example of mechanical energy?

• A ball rolling down a slide when let go.

• Hitting a baseball with a bat.

• Watching a ball get thrown over the fence at recess.

• Catching a ball during dodge ball.