Forms of Energy and Energy Transfer

Sara is making an electrical circuit with a light bulb. She needs a rod to complete the circuit. Which of these could be used to complete the circuit and make the light bulb light up?

• a glass rod

• a rubber rod

• a copper rod

• a wooden rod

. When Derrick plugs in his bedroom lamp he notices that the wire is covered with plastic. Why does the wire have a plastic covering?

• The plastic converts the electricity to thermal energy

• The plastic helps conduct the electricity to light the lamp.

• The plastic is an insulator to protect people from the electricity

• The plastic is used to protect the copper wire underneath, which is very expensive.

What purpose do batteries have in an electrical circuit?

• They absorb the thermal energy.

• They store light energy for later use.

• They convert chemical energy to electrical energy.

• They convert solar energy to usable kinetic energy.

Jennifer is getting ready for school on a cold day in February. She wants to make sure her hair is completely dry before she leaves her house. She plugs her hair dryer into the wall outlet and turns it on. Which of the following describes one of the steps involved in using energy to dry Jennifer's hair?

• Thermal energy is changed into mechanical energy, which makes the motor in the hair dryer move.

• Electrical energy is changed into heat energy, which makes the motor in the hair dryer move.

• Mechanical energy is changed into heat energy, which makes the motor in the hair dryer move.

• Electrical energy is changed into mechanical energy, which makes the motor in the hair dryer move.

Tags

NGSS.MS-PS3-5

An object with negative static charge attracts some small bits of paper. This means that the paper bits____________________.

• are neutral

• have positive charge

• have a negative charge

• have no charge

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NGSS.MS-PS2-3

Which of the following is NOT an example of using energy to create a change?

• A fireplace burning wood for a fire

• A solar cell using light for electricity

• The gasoline in a car making the engine run

• A pile of chopped tree logs

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NGSS.MS-PS1-4

Bobbie is playing with his radio-controlled car by using a handheld remote box. What type of energy is being used to power Bobbie's car?

• chemical energy

• electrical energy

• heat energy

• mechanical energy

Kay is riding her bicycle down a hill towards her school. Instead of her pedaling, the bicycle is using the stored energy created as she pedaled her bicycle up the hill. What type of energy is Kay's bike using?

• chemical energy

• thermal energy

• electrical energy

• mechanical energy

Tags

NGSS.MS-PS3-5

Mercedes was using a flashlight to find a lost shoe in her closet. Why does she need to move the flashlight in order to search the entire closet?

• The light from the flashlight travels only in a straight line so it only lights the part of the closet where it is pointed.

• The light from the flashlight will not reflect in the closet.

• The light from the flashlight is absorbed by the closet walls and does not provide enough light for Mercedes to see.

• The light from the flashlight is refracted by the objects in the closet and points away from where Mercedes is looking for her shoe.

Tags

NGSS.MS-PS4-2