Question 1

Which method of thermal energy transfer happens when you accidentally touch a hot metal spoon that has been sitting in a bowl of boiling soup?

Accepted Answer

Conduction

Answer

Insulation

Answer

Radiation

Answer

Convection

Question 2

An oven mitt is used to handle a hot baking tray because it is a good thermal insulator. What is the primary purpose of a thermal insulator?

Accepted Answer

To slow down the transfer of heat

Answer

To attract thermal energy from the air

Answer

To change thermal energy into light

Answer

To increase the speed of heat transfer

Question 3

In which direction does thermal energy always flow between two objects of different temperatures?

Accepted Answer

From the warmer object to the cooler object

Answer

From the cooler object to the warmer object

Answer

From the smaller object to the larger object

Answer

Only from solids to liquids

Question 4

Why are most cooking pans made of metal while their handles are often made of plastic or wood?

Accepted Answer

Metal is a good conductor that transfers heat to food, while plastic and wood are insulators.

Answer

Metal is an insulator that keeps the food cold, while plastic attracts heat.

Answer

Metal handles would get too cold to touch due to convection.

Answer

Plastic and wood conduct heat much faster than metal does.

Question 5

If you place an ice cube in a cup of warm water, what happens to the thermal energy?

Accepted Answer

Thermal energy moves from the warm water to the ice cube

Answer

Cold energy moves from the ice cube to the water

Answer

The thermal energy stays the same in both the ice and the water

Answer

Thermal energy moves from the cold ice cube to the warm water

Question 6

Which of the following is the best example of thermal energy transfer through conduction?

Accepted Answer

A chocolate bar melting in your hand

Answer

Heating a room with a space heater

Answer

Getting a sunburn at the beach

Answer

Feeling the heat from a light bulb without touching it

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