Exploring Thermal and Electrical Conductors and Insulators

What happens when you place a metal spoon in a hot beverage?

• The beverage cools down immediately.

• The spoon absorbs the heat and becomes hot.

• The spoon changes color.

• The spoon remains cold.

Why does a spoon with a rubber or plastic handle transfer less heat?

• Rubber and plastic are poor conductors of heat.

• Rubber and plastic are good conductors of heat.

• Rubber and plastic change the temperature of the beverage.

• Rubber and plastic absorb heat quickly.

What is the process called when heat is transferred through direct contact?

• Insulation

• Convection

• Conduction

• Radiation

How do particles behave near a heat source during conduction?

• They stop moving.

• They vibrate more rapidly.

• They move slower.

• They move away from the heat source.

Which materials are typically good thermal conductors?

• Rubber and glass

• Wood and plastic

• Metals like copper and aluminum

• Paper and cloth

Why are cooking pots made of metals?

• Metals are poor conductors of heat.

• Metals are lightweight.

• Metals are easy to clean.

• Metals transfer heat effectively from the stove to the food.

What is the purpose of thermal insulators in cooking pot handles?

• To prevent the handles from getting hot.

• To increase the weight of the pot.

• To make the handles look attractive.

• To conduct heat to the handles.

Which of the following is a natural insulator found in animals?

• Feathers in birds

• Scales in reptiles

• Shells in mollusks

• Fins in fish

Why should electrical wires be insulated with plastic tubing?

• To make them look colorful.

• To prevent electrical shocks.

• To increase their length.

• To make them flexible.

Why is it dangerous to touch electrical devices with wet hands?

• Water changes the device's temperature.

• Water insulates the device.

• Water is a poor conductor of electricity.

• Water is a good conductor of electricity.