Force, Motion, and Energy Review

Which of the following materials is used to cover electricals wires for safety because it is an insulator of electric charge?

• Copper

• Aluminum

• Iron

• Rubber

Students built an incomplete circuit. Which of the following objects could be placed in the space between the wires to complete the circuit and make the bulb light?

• Wooden craft stick

• Plastic bottle cap

• Iron paper clip

• Rubber pencil eraser

Tags

NGSS.MS-ETS1-1

Jake is creating a project with an electric circuit. For part of the project, Jake needs an insulator. A good insulator would NOT be made of which of the following?

• Plastic

• Rubber

• Copper

• Glass

Electricity will flow in an electric circuit only if the circuit-

• has several batteries

• makes a complete path

• produces light energy

• has the right kind of insulators

Students attached a buzzer to a battery with a switch. The busser is not making any noise. Which of the following changes would most likely make the buzzer produce sound?

• Remove the battery

• Add more wire

• Use a bigger buzzer

• Close the switch

All of the objects below are conductors of electricity EXCEPT-

• 
• 
• 
• 

Tags

NGSS.MS-PS2-3

Students hooked up a battery and bulb with wires as shown. For the bulb to light, the object the students place in the space between the two wires must be-

• a conductor of electricity

• made of plastic or wood

• at room temperature

• an electrical insulator

Elijah places four different materials at the same temperature onto a hot plate to find out which material is the best insulator. The information presented in the table shows the temperature of each material after 15 minutes. Elijah can conclude that which of the following materials is the best insulator?

• Material 1

• Material 2

• Material 3

• Material 4

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

The illustration shows a circuit with a battery, a bulb, and an open switch, all connected with wires. This electric circuit can be completed by-

• unscrewing the light bulb

• closing the switch

• cutting the wires

• reversing the batter

Conductors allow thermal and electrical energy to pass through easily. Insulators prevent the flow of thermal and electrical energy. Which of the following items is a poor conductor and a good insulator?

• Silver

• Wood

• Tin

• Copper

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4