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The balloon size will decrease in case of .............................

• Thermal expansion

• Thermal contraction

The figure shows _________

• gas particles vibrate in place

• liquid particles sliding past each other

• gas particles moving freely

• liquid particles moving freely

How does heat energy flow?

• equally between the receiver and the source

• from a high temperature to a low temperature.

• all of the above

• none of these

transfer thermal energy by electromagnetic waves

• radiation

• conduction

• convection

In the water cycle, what happens during evaporation?

• Water vapor changes to liquid water.
• Water falls to the ground from clouds.
• Liquid water changes to water vapor. 
• Water flows over the ground. 

On a cold rainy day a baby is touching a cold window.  It feels so cold. Which way is the heat moving moving? 

• Cold is moving from the window to the hand.
• Heat is moving from the hand to the window.
• Heat doesn't move.
• It moves in currents

Between which points is the temperature of the substance remaining constant?

• A-B only

• A-B, C-D, and E-F

• B-C only

• B-C and D-E

Categorize the heat transfer in each scenario:

1) The sun is shining onto a car, making it hot

2) You burn your hand by touching a hot seatbelt in the car

3) The soda in the cupholder starts to get warm

• 1) Radiation

  2) Convection

  3) Radiation

• 1) Conduction

  2) Conduction

  3) Convection

• 1) Convection

  2) Conduction

  3) Radiation

• 1) Radiation

  2) Conduction

  3) Convection

is when water vapor cools down and turns into tiny water droplets. These droplets form clouds.

When particles become hotter, they tend to move...

• Slower

• Faster

• At the same rate

• Backwards