2-2 Heat

Question 1

The average amount of energy of motion in the molecules of a substance

Answer 1

Temperature

Question 2

A thin glass tube with the bulb on one and that contains a liquid, usually mercury or colored alcohol

Answer 2

Thermometer

Question 3

Freezing point of water

Answer 3

0 degrees Celsius 32 degrees Fahrenheit

Question 4

The boiling point of water

Answer 4

100 degrees Celsius and 212 degrees Fahrenheit

Question 5

Refers to the energy transferred from a hotter object to a cooler object

Answer 5

Heat

Question 6

Heat is transferred in three ways

Answer 6

Radiation
Conduction
Convection

Question 7

The direct transfer of energy

Example: the hot sun on your face

Answer 7

Radiation

Question 8

The direct transfer of heat from one substance to another substance that it is touching is called
Example: walking barefoot on hot sand

Answer 8

Conduction

Question 9

The transfer of heat by the movement of a fluid is called

Example: boots drying over a furnace

Answer 9

Convection

Question 10

Gases are made up of

Answer 10

Small particles, called molecules

Question 11

Liquids expand when they are heated and the molecules

Answer 11

Move faster

Question 12

Liquids contract when they’re cooled and the molecules

Answer 12

Move slower

Question 13

Radiation and conduction hear the air near Earth’s surface, when the air is heated the molecules have more energy and move faster, the molecules bump into each other and move farther apart or become less dense, cooler denser air sinks forcing the warmer less dense air to rise, the air near the ground is warmer, convection causes most of the heating of the troposphere

Answer 13

The heating of the troposphere

Question 14

The total energy of motion in the molecules of a substance is called

Answer 14

Thermal energy