Energy and Electricity

A guitarist strums two strings of the same thickness on a guitar. The first string vibrates more quickly than the second string. What is true about the pitch of the strings?

• The first string has a higher pitch than the second string

• The second string has a higher pitch than the first string

• The first string and the second string have the same pitch

• The pitch of the second string depends on the pitch of the first string

Tags

NGSS.MS-PS4-1

Which is the best description of a sound wave when the pitch of the sound is very high?

• The particles have a lot of potential energy

• The temperature of the sound increases

• The particles are vibrating very fast

• The waves are moving in only one direction

Tags

NGSS.MS-PS4-1

Look carefully at the picture.

How is heat transferred from the campfire to the people?

• Radiation

• Thermal insulation

• Sound waves

• Conduction

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which of these items is the best conductor of heat?

• A metal fork

• A wooden door handle

• A solid plastic ladle

• A foam plastic drink container

Tags

NGSS.MS-PS3-4

Which of the following is NOT a form of energy?

• Muscle

• Electrical

• Thermal

• Sound

Which of the following shows the best example of how heat flows from hot to cold?

• The sun warms your skin

• You rub your cold hands together quickly

• A metal spoon in soup becomes warm

• A mobile turns from a candle burning below it

Tags

NGSS.4-PS3-2

Which object is the best example of a resistor?

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Which list names different forms of energy?

• Magnetic, resistor, conductor

• Sound, light, heat

• Copper, battery, switch

• Transform, transfer, circuits

Inside a light bulb is a wire. When electric energy travels through the wire, it transforms into heat energy and light energy.

Which pair of sentences explains what happens if the wire breaks?

• The wire is part of the electric circuit. The electric current will not flow if it breaks.

• The wire is not part of the electric circuit. The electric current will continue to flow, but the bulb will not light.

• The wire is not part of the electric circuit. The electric current will flow, but the bulb is burned out.

• The wire is part of the electric circuit. The electric current will flow if the glass bulb is not broken.

Which diagram shows current flowing through an electric cicuit?

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