L2 Video #2: Conductors and Insulators: Thermal Energy Transfer

Which of the following slows down the flow of thermal energy transfer through it?

• conductors

• insulators

Why are metals used to make cooking dishes?

• They are good conductors.

• They are good insulators.

True or False:  The particles in metals have trouble moving so they don't easily pass along kinetic energy to neighboring particles.

• True

• False

Metals ____________________ transfer the thermal energy from the stove to the food or liquid inside. (Choose the word that correctly completes the sentence).

• quickly

• slowly

Why can the spoon left in the hot food give you a burn if you touch it?

• Your hand quickly transfers the cold from your hand into the hot spoon.

• The spoon quickly transfers the thermal energy from the hot food to your hand.

True or False:  An advantage to a conductor is that they heat up quickly but they don't cool down quickly.

• True

• False

A student wants to test for heat loss in different materials.  She pours hot coffee into a metal cup and the same amount of coffee into a ceramic cup.  Which one will cool down faster?

• the coffee in the metal cup

• the coffee in the ceramic cup

Which of the following are good uses of insulators? (Choose the best 2 answers)

• keeping our food hot

• keeping our food cold

• conducting heat to our food

What is the function of an insulated coffee container?

• to keep the cold from moving into the warm coffee

• to keep the warm air outside the cup from moving into the warmer coffee

• to prevent the hot coffee from transferring its thermal energy to the outside 

How would the rate of thermal energy transfer to your hand from hot food differ between a metal spoon and a wooden spoon?

• The thermal energy from the food would transfer through the wooden spoon to your hand at a slower rate than the metal spoon.

• The thermal energy from the food would transfer through the wooden spoon to your hand at a faster rate than the metal spoon.