Pre-Assessment Electricity, Conductors, and Insulators Force, Motion, and Energy

First and last name

1. Which of these would be a good insulator of electricity? Remember that an insulator is materials that do not allow electricity to pass through them.

• A Steel
• B Rubber
• C Copper
• D Aluminum

2. Joshua is making a trivet (a trivet is a heat resistant material that does not allow heat to pass through). A trivet is placed on a table beneath a hot pot. He knows that he must choose something that will NOT allow heat to pass easily from the hot pot to the table. Which material should Joshua use to make the trivet?

• A Wood
• B Aluminum
• C Copper
• D Iron

3. The diagram shows an electrical circuit with a buzzer. The students noticed that the buzzer was not making any sounds. What could be done to this circuit to make the buzzer work?

• A Add another battery to the circuit.
• B Replace the buzzer with a smaller one.
• C Close the switch to complete the circuit.
• D Switch the wires to get a better connection.

4. Determine which are electrical insulators. Select more than one answer choice.

• iron

• copper

• Wood

• Plastic

• Rubber

5. The diagram shows an electrical circuit. What object could be placed in the open space between the wires to complete the circuit?

• A Penny
• B Toothpick
• C Eraser
• D Crayon

4. John is designing a pot holder (a pot holder is a material that does not allow heat to pass through). A pot holder is used to hold a hot pot. He needs to choose a material that will NOT allow heat to pass easily from the hot pot to his hand. Which material should John use to make the pot holder?

• A Eraser

• B Steel

• C Copper

• D Wool

6. A student noticed that the light bulb was not lighting up in his circuit. What could be done to this circuit to make the light bulb work?

• A Add another light bulb to the circuit.

• B Replace the light bulb with a bigger one.

• C Close the switch to complete the circuit.

• D Switch the wires to get a better connection.

7. Which of these would be a good conductor of electricity? Remember that a conductor is materials that allow electricity to pass through them.

• A Wood

• B Glass

• C Copper

• D Rubber