Heat transfer Quiz

Question 1

heat transfer through touching as

molecules transfer kinetic energy

Answer 1

Conduction

Question 2

heat transfer by electromagnetic waves going through nothing.

Answer 2

Radiation

Question 3

heat transfer by a flow of fluid due to density differences caused by temperature differences

Answer 3

Convection

Question 4

Examples:

You stand near a fire and your face begins to feel hot

Answer 4

Radiation

Question 5

Examples:

You watch the pasta you are cooking lifting up and going to the sides of the pan and then down

Answer 5

Convection

Question 6

You heat some pasta sauce by setting a pan of it on the burner of an electric stove

Answer 6

Conduction

Question 7

Moist air heated by a hot summer day rises up (later causing the water vapor to condense into a thundercloud)

Answer 7

Convection

Question 8

It is really cold around your ankles in our classroom in winter, but not so bad on your desktop

Answer 8

convection

Question 9

You leave a metal spoon in your pot and burn yourself when you grab it

Answer 9

conduction

Question 10

you stick your tongue on the chain of a swing in the winter and it freezes and gets stuck

Answer 10

conduction

Question 11

you get a sunburn while sitting at the beach

Answer 11

radiation

Question 12

cold salad below the burger. which type of heat transfer are you preventing?

Answer 12

convection

Question 13

a flow of energy transferred from hotter things to cooler things until it reaches equilibrium by radiation, convection, conduction

-it’s the flow of thermal energy, the total kinetic energy (motion energy) of all the molecule.

Answer 13

Heat

Question 14

a measure of the average kinetic energy of molecules

Answer 14

Temperature

Question 15

How does heat flow? In which direction?

Answer 15

From hot to cold, to be brought to equilibrium

Question 16

What is equilibrium?

Answer 16

when opposite forces are balanced

Question 17

How wavelengths/radiation come from the sun?

Answer 17

1. Visible
2. IR (infrared)
3. UV (ultraviolet light)

Question 18

Which wavelengths/radiation are reradiated by the earth?

Answer 18

IR (infrared )

Question 19

Understand the greenhouse effect

Answer 19

this greenhouse effect gives us a livable Earth. But too many greenhouse gases = global warming = not good.

• the glass of a greenhouse allows light to pass through it. The light is then converted to IR energy. The glass then prevents the IR from escaping and it warms the greenhouse.

Question 20

Gases that cause a greenhouse effect

Answer 20

Carbon Dioxide (CO2), water vapor (H2O), methane (CH4)