States of Matter
Your hot cocoa cools on the table. Where does the heat go?
Heat is transferred from molecules of the cocoa to molecules of the mug to molecules of the air in the room.
Volume changes when a liquid is heated.
What is thermal expansion
Heat is transferred from molecule to molecule by collision.
What is conduction.
The molecules slow down and thermal contraction occurs in a substance when...
.... thermal energy (or heat) is transferred away from substance.
The change of a liquid to a gas using heat.
What is evaporation
Heat is transferred primarily this way in our atmosphere.
What is convection.
A physical change when matter changes from one state to another.
What is a phase change.
What is absolute zero.
When the temperature of your cocoa cools so that it is the same temperature as the room, you have....
thermal equilibrium (when both temperatures will be the same.)
The average kinetic energy of molecules.
What is temperature
What is true about the average kinetic energy of your metal water bottle and your binder reminder.
What is they are all have the same average kinetic energy
When you add energy to a liquid, what happens to the particles?
What is they move faster and spread out!
Thinking about temperatures, cities that are located next to large bodies of water...
What is they have a smaller range in temperatures over the year.
Compare the thermal energy of a giant iceberg with a hot cup of coffee.
The iceberg is made of so many molecules, all moving slowly. If you were to add the movement of all those molecules, you will find the iceberg has much more thermal energy than that coffee.
You notice the red liquid in your thermometer going down. (thinking about the motion of those molecules in the red liquid)
What is thermal contraction.