Match the following materials with their properties.

• Insulator

• A material used to insulate wires

• Electrochemical cell

• A material that resists electricity

• Conductor

• A type of battery

• Insulation material

• A material that allows electricity to flow easily

Tags

NGSS.MS-PS2-3

Which material prevents electric shocks?

• Plastic

• Metal

• Water

• Aluminum

Answer explanation

Plastic is an insulator, which means it does not conduct electricity. This property makes it effective in preventing electric shocks, unlike metals and water, which can conduct electricity.

What is an electric circuit?

• A type of battery

• A complete pathway for electric current

• A material that resists electricity

• A broken wire

Answer explanation

An electric circuit is defined as a complete pathway for electric current to flow. This means it includes all necessary components, allowing electricity to travel from the power source, through the circuit, and back.

Insulators allow electricity to flow easily.

• True

• False

Answer explanation

Insulators are materials that do not allow electricity to flow easily. Therefore, the statement that insulators allow electricity to flow easily is false.

What is an example of an insulator?

• Rubber

• Salt

• Electrons

• Conductor

Answer explanation

Rubber is an example of an insulator because it does not conduct electricity well, making it effective for preventing electrical flow. In contrast, salt and conductors allow electricity to pass through, while electrons are charged particles, not materials.

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

Match the following terms with their definitions.

• A material that allows the flow of electric current.

• Electricity

• A synthetic material used for insulation.

• Plastic

• The flow of electrons.

• Insulator

• A material that resists the flow of electric current.

• Conductor

Which of the following is a complete pathway for electric current?

• Insulator

• Circuit

• Plastic

• Salt

Answer explanation

A circuit is a complete pathway that allows electric current to flow. Insulators, like plastic, prevent current flow, while salt can conduct electricity but does not form a complete pathway on its own.

What is a material used to prevent electric shocks?

• Conductor

• Insulator

• Electrons

• Salt

Answer explanation

An insulator is a material that resists the flow of electric current, preventing electric shocks. In contrast, conductors allow current to flow, making them unsafe for shock prevention.

Which of the following is NOT a conductor?

• Copper

• Rubber

• Aluminum

• Gold

Answer explanation

Rubber is an insulator, meaning it does not conduct electricity, while copper, aluminum, and gold are all excellent conductors. Therefore, rubber is the correct answer as it is NOT a conductor.

The primary function of an insulator is to (a)  

• To allow electricity to flow

• To prevent the flow of electricity

• To increase electric current

• To decrease electric current

Answer explanation

The primary function of an insulator is to prevent the flow of electricity. Insulators are materials that do not allow electric current to pass through them, making them essential for protecting and managing electrical systems.