Heat and Temperature

Heat and Temperature

Multiple Choice

Thermometers measure:

• Heat

• Temperature

Temperature vs Heat

• All matter is made of tiny particles called molecules which are always moving.

• Temperature is a measure of how much they move.

• Heat is a measure of how this movement energy transfers between different things.

Poll

Does heat move from hot things to cold things or from cold things to hot things?

• Hot to Cold

• Cold to Hot

Heat always moves from hot to cold.

• Fridges work by removing heat from the chamber rather than 'adding cold'

• Sweat takes heat away from the body, transferring it to the air

• Hot coffee heats ice cubes in an iced latte, melting them

Multiple Choice

A spoon was placed in a bowl of soup and the soup and the spoon are now at the same temperature.

Identify in which direction thermal energy was transferred. 

• Spoon to soup

• Soup to spoon

• There will be no overall transfer of thermal energy

• I'm not sure

There are three ways that heat can move from one thing to another.

Can you name them?

​Heat moves through direct contact between objects, like a spoon getting hot in a cup of tea.

Conduction

​Heat moves through fluids (liquids or gases) by currents, like warm air rising and cool air sinking.

Convection

​Heat is transferred through electromagnetic waves, like the warmth you feel from the sun.

Radiation

Multiple Choice

What type of heat transfer is shown in the picture?

• Convection

• Conduction

• Radiation

Multiple Choice

What type of heat transfer is shown in the picture?

• Convection

• Conduction

• Radiation

Multiple Choice

What happens to particles when a substance is heated?

• They stop moving

• They vibrate more quickly

• They lose energy

• They move slower

You will need:

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Activity - Fooling your thermoreceptors

• ​3 plastic containers with different temperature water (very cold, warm, room temp)

• paper towel

• timer

Multiple Choice

In the hand experiment (placing your hands in hot and cold water, then into room temperature water), what sensation do you expect when placing your hand in the room temperature water?

• Both hands feel the same temperature

• The cold hand feels warm, and the hot hand feels cool

• The hot hand feels hot, and the cold hand feels cold

• Both hands feel cold