Thermal Energy Conductivity

Specific heat is

• the amount of matter in a substance.

• the amount of thermal energy required to increase the temperature of 1 kg of a substance by 1C.

• when energy carried by a wave is taken in by the substance.

• when energy carried by a wave bounces off a surface.

The sand at the beach heats up quickly during the day and cools down quickly at night. The reason is that sand

• is very thick with many layers.

• has a high specific heat.

• conducts heat well.

• has a low specific heat.

3. How does the change in the mass of a water affect the change in temperature gained when heated?

• As the mass increases the temperature gained increases.

• As the mass decreases the temperature gained decreases.

• As the mass increases the temperature gained decreases.

• All of the above

What do aluminum, copper, and iron have in common?

• Used to make items for cooking.

• They are conductors.

• They are substances that transfer heat easily.

• All of the above

Air is good to use for

• slowing the transfer of heat (as an insulator).

• reflectivity.

• conducting heat (as a conductor).

• absorbency.

What did we find out about the specific heats of sand and water in the Specific Heat Lab?

• Water has a higher specific heat than sand because it heats up quicker.

• Sand has a higher specific heat that water because it heats it quicker.

• Water has a higher specific heat than sand because it heats up slower.

• Water has a lower specific heat than sand because it heats up slower.

Compared to water, most metals have HIGH specific heats.

• True

• False

What is an insulator?

• It's a substance that does not transfer heat easily.

• It's a substance made out of wood, fabric, or styrofoam for example.

• It's a substance that blocks or slows down the flow of heat.

• All of the above

Why does a good insulator keep hot things hot AND cold things cold?

• It stops the heat from transferring from the warmer object to the cooler object.

• It keeps the "cold" in and the "hot" out

• It keeps the "hot" in and the "cold" out

• None of the above

Which of the following is the BEST insulator?

• Glass

• Plastic

• Styrofoam

• Metal