Physical Science

When you are cold, rubbing your hands together very quickly can warm them up.Why does this happen?

• Thermal energy is converted to electricity.
• Mechanical energy is converted to thermal energy.
• Mechanical energy is converted to sound.
• Electrical energy is converted to mechanical.

Tags

NGSS.MS-PS3-5

Andrew uses a fan that is plugged into the wall to cool off his bedroom. The fan starts to move and the motor makes a whirring noise. Choose the response that lists the 3 energy forms taking place.

• electrical, mechanical, sound
• light, mechanical, thermal
• thermal, electrical, sound
• electrical, mechanical, thermal

When using a solar-powered calculator, what source of energy is being used to power the calculator?

• Electrical energy
• Light energy
• Mechanical energy
• Sound energy

Which two objects use electrical energy to produce sound?

• A camera and a pencil sharpener
• A microphone and a stove
• A lamp and a television
• A radio and an MP3 player

Which observations listed above involved the use of mechanical and sound energy?

• Observations 1, 2, and 6
• Observations 3, 4, and 6
• Observations 1, 3, and 5
• Observations 1, 4, and 6

Tags

NGSS.MS-PS3-5

NGSS.MS-PS4-1

The teacher opened a window in the classroom to cool down the room.  Which of these activities uses the same type of energy that the teacher used?

• Playing the drums using mechanical energy
• Burning wood using thermal energy
• Lighting light bulbs using electrical energy
• Talking to someone using sound energy

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

NGSS.MS-PS3-4

Kay constructed a circuit using a battery, copper wire, a switch, and one of these light bulbs. Which light bulb will successfully complete the circuit?

• A, because the circuit is open
• A, because the circuit is closed
• B, because the circuit is open
• B, because the circuit is closed

Circuit A is constructed using a 6-volt battery, copper wires, and a light bulb. Circuit B is constructed using a 9-volt battery, string, and a light bulb. Which of the circuits produces light?

• Circuit B because the battery produced more power than needed.
• Circuit A because the wires were lacking proper insulation in circuit B.
• Circuit A because copper wires are good conductors of electricity.
• Circuit B because it was in a complete circuit.

Some students constructed a battery–powered circuit like the one in the above picture.Which of the following BEST explains why the light bulb would not light up?

• The circuit requires a different type of battery.
• The circuit needs more power than is available.
• The switch in the circuit is missing.
• The wires are connected incorrectly to the battery

Observe the circuit above.  Which procedure can a student use to turn on the blue and green lights only?

• The student cannot follow any procedure to turn on the green and red lights only.
• The student can close switch A and switch C, but leave switch B open.
• The student can close switch A and switch B, but leave switch C open.
• The student can close switch B and switch C, but leave switch A open.