heat transfer

You pick up a can of soda off of the countertop. The countertop underneath the can feels colder than the rest of the counter. Which explanation as to why this happens fits best?

• the cold has been transferred from the soda to the counter

• there is no heat energy left in the counter

• some heat has been transferred from the counter to the soda

After cooking an egg in boiling water, you cool the egg by putting it into a bowl of ice cold water. Which of the following explains the eggs cooling process in the ice water?

• heat energy is transferred from the water to the egg

• heat energy is transferred from the egg to the water

• cold moves from the water into the egg

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Why do we wear sweaters in cold weather?

• to generate heat

• to reduce heat being transferred from the body to the surrounding air

• to keep the cold from transferring to your body

Amy wraps herself in a blanket to stay warm. Her daughter Brittany wrapped her plastic dolls in a blanket but can’t understand why they don’t warm up. Why don’t they warm up?

• the blankets she uses are poor conductors

• the dolls are made of materials that do not produce heat

• the blankets she uses are probably poor insulators

Coolers, blankets, and coats are good ________________________________.

• conductors

• insulators

• producers of heat

As water in a freezer turns into ice,__________

• The water absorbs cold energy from the air in the freezer.

• The air in the freezer transfers the cold energy to the water

• Heat from the water is transferred to the air in the freezer, where the air absorbs the heat.

Tags

NGSS.MS-PS1-4

On a warm sunny day, why do you feel warmer when wearing darker colors?

• Dark colors are heavier materials

• Dark colors absorb more heat

Tags

NGSS.MS-PS3-3

Feeling warm when wearing dark colored clothes on a sunny day is an example of which type of heat transfer? _______________________________

• conduction

• convection

• radiation

If you put a metal spoon and a wooden spoon into a pot of boiling water, the metal one will become too hot to touch. Why?

• Wood isn’t as strong as metals.

• Metals conduct heat better than wood.

• Wood conducts heat better than metals.

Tags

NGSS.MS-PS3-3

Putting a spoon into a pot of boiling water and the spoon becoming hot is an example of which type of heat transfer? _______________________________

• conduction

• convection

• radiation