Lesson 2.1

Question 1

What does adding energy (heating) to atoms and molecules do?

Answer 1

It increases their motion, resulting in an increase in temperature.

Question 2

What does removing energy (cooling) from atoms and molecules do?

Answer 2

It decreases their motion, resulting in a decrease in temperature.

Question 3

What is conduction?

Answer 3

Energy can be added or removed from a substance through a process called conduction. In conduction, faster-moving molecules contact slower-moving molecules and transfer energy to them. During conduction, the slower-moving molecules speed up and the faster-moving molecules slow down.

Question 4

What is temperature?

Answer 4

Temperature is a measure of the average kinetic energy of the atoms or molecules of a substance.

Question 5

What is heat?

Answer 5

Heat is the energy transferred from a substance at a higher temperature to a substance at a lower temperature.

Question 6

Are all materials good conductors of heat?

Answer 6

Some materials are better conductors of heat than others.

Question 7

Touch your metal chair or desk leg and then touch your wooden or plastic desktop or some other wood or plastic. Which feels colder, the metal or the wood/plastic?

Answer 7

The metal would feel colder because the metal is a better conductor of heat.