What type of heat transfer is this?
Density
Differential Heating of Earth
Particles and Heat
--- Challenge ---
(these won't be on the quiz...)
100


You touch a hot stove with your hand. Ouch!

Conduction

100

Which is more dense: a pound of bricks or a pound of feathers?

A pound of bricks (although it weighs the same as a pound of feathers)

100

No

100

Fluids include which two states of matter?

Liquids and gases

100

Does this show summer or winter in the northern hemisphere?

Summer

200

You notice a "rolling boil" in your pot of water when cooking.

Convection

200

How do you calculate density?

Mass / Volume `M/V` 

200

Which heats faster: land or water?

Land

200

Which one of these shows the flow of a convection current when heated from below?

D

200

How does a hot air balloon fly?


It warms the air in the balloon which makes it less dense than the air around it. This causes it to rise.

300

A microwave

Radiation

300

How does adding salt to water affect its density?

Adding salt increases the density of water.

300

Which cools slower: land or water?

water

300

What two things happen to particles in a fluid when it loses thermal energy?

The particles slow down and move closer together.

300

What is the density of fresh water?

1 g/ml

400

Greenhouse gases heat up from this type of heat transfer.

Radiation

400

A glass of saltwater has a mass of 3.6 g and a volume of 3.2 ml. What is its density?

1.125 g/ml

400

Students heated soil and water under a heat lamp and collected this data. When was the heat lamp turned off in this experiment?

at 15 minutes

400

Is this a solid, liquid, or gas?

liquid

400

What are the two ways to increase the density of a substance?

By adding more particles and by decreasing the temperature

500

A metal rod slowly heats up from one end to the next:


conduction

500

A gold bar has a volume of 4.5cm3 and a mass of 82.35g. What is its density?

18.3 g/cm3

500

Living near the ocean makes for ________ winters and ________ summers.

warmer winters and cooler summers

500

Why does tile floor feel colder than a carpet when each are the same temperature?

Tile conducts heat better than carpet.

500

What was the first day for students in the Ellen Garrison building?

February 24, 2025

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