Thermal Energy and Heat

A glass of water is put into a freezer. What happens to the molecules of the water?

• The movement of the molecules speeds up.

• The movement of the molecules slows down.

• The movement of the molecules doesn't change at all.

• The molecules stop moving completely.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

When the movement of the molecules slows down in a glass of water in the freezer, what happens to the temperature of that water?

• The temperature doesn't change at all.

• The temperature increases.

• The temperature decreases.

• The temperature rises and falls over and over rapidly.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

At a water park, there is a kiddie pool (with 500 gallons of water) and a wave pool (with 550,000 gallons of water). The water in both areas is 74^oF. Which choice is true?

• Both pools have equal amounts of heat energy.

• Neither pool contains any heat energy.

• The kiddie pool has more heat energy.

• The wave pool has more heat energy.

Tags

NGSS.MS-PS3-5

Which item do you think has the least thermal energy?

• all the water of the Arctic Ocean

• a wildfire that covers 2,000 acres of land

• a grande (medium) cup of hot Starbucks coffee

• all the water in the Aquaventure Waterpark swimming pool

Tags

NGSS.MS-PS3-4

If you are cooking in the kitchen and the temp. in the room is 72^oF, which of the following items will have their molecules start to speed up if they are left sitting out at that air temperature? (Choose 2.)

• a tray of ice cubes that just came from the freezer

• french fries that just came out of the oven set to 350^oF

• a cup of hot tea that you just heated up in the microwave

• a frozen pizza that you just took out of the freezer

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

A frozen piece of chocolate is taken out of a freezer. What begins to happen to the molecules of the chocolate?

• The movement of the molecules speeds up.

• The movement of the molecules slows down.

• The movement of the molecules doesn't change at all.

• The molecules stop moving completely.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

Holding a hot cup of cocoa is an example of which type of heat transfer?

• convection

• conduction

• radiation

When you touch something that feels cold, 

• heat from your hand moves into the cold substance.

• coldness moves from the cold substance into your hand.

• it melts.

• it freezes.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

You're holding hands with your best friend.  Your friend's hands are REALLY warm and yours are really cold.  After a few minutes, this has changed.  How might you explain what happened?

• The cold energy from your hand transferred to your friend's hand through conduction.

• The heat energy from your friend's hand transferred to your hand through conduction. 

• The cold energy from your hand transferred to your friend's hand through convection.

• The heat energy from your friend's hand transferred to your hand through convection.

Tags

NGSS.MS-PS1-4

As you touch a hot stove the heat transfers -

• from your hand to the stove

• from the stove to your hand

• It doesn't transfer

Tags

NGSS.MS-PS1-4