Heat Transfer LAB

Which setup popped the kernels faster, the beaker with oil or the foil without oil?

• The beaker with oil

• The foil without oil

• Both setups popped the kernels at the same rate

Did the first kernel in each setup pop at the same time as the last kernel? Explain your observations.

• Yes, the kernels popped at the same time in both setups.

• No, the kernels popped at different times in both setups.

• No, the kernels popped at different times in one setup but not the other.

Compare the time it took for the first kernel and the last kernel to pop in each setup.

• The first kernel popped faster in the beaker with oil.

• The last kernel popped faster in the beaker with oil.

• There was no difference in the time it took for the first and last kernels to pop in each setup.

What does this comparison reveal about the rate of heat transfer in each case?

• Oil is a better conductor of heat than foil.

• Foil is a better conductor of heat than oil.

• Both oil and foil are equally good conductors of heat.

Define conduction in your own words. How did conduction play a role in this experiment?

• Conduction is the transfer of heat through direct contact. In this experiment, conduction helped transfer heat from the hot plate to the popcorn through the oil or foil.

• Conduction is the transfer of heat through the movement of a fluid. In this experiment, conduction did not play a role.

• Conduction is the transfer of heat through electromagnetic waves. In this experiment, conduction did not play a role.

How did the temperature of the water change as you heated it?

• The temperature remained constant.

• The temperature increased gradually.

• The temperature increased rapidly.

What did you observe happening to the sugar cube as the water heated?

• The sugar cube remained stationary.

• The sugar cube sank to the bottom of the beaker.

• The sugar cube moved upward in the water.

Define convection.

• Convection is the transfer of heat through direct contact.

• Convection is the transfer of heat through the movement of a fluid.

• Convection is the transfer of heat through electromagnetic waves.

How did you observe convection in this experiment?

• By measuring the temperature of the water.

• By observing the movement of the sugar cube.

• By observing the color of the water.

Based on your observations, explain the role of convection in the movement of the sugar cube.

• Convection caused the sugar cube to sink.

• Convection caused the sugar cube to remain stationary.

• Convection caused the sugar cube to move upward.