1. { Heat and Changes of State Mr. Perez

2.  Everything made of molecules (or atoms or particles) has heat.  Heat depends on the size AND temperature of an object  Even cold things have heat Bill Nye Recap

3.  Temperature, thermal energy and heat are all closely related but are NOT the same thing.  Thermal energy- the total energy of all the particles in an object  Heat- is the transfer of thermal energy from a warmer object to a cooler object  We measure heat in JOULES What is heat?

4.  Temperature- average kinetic energy of the particles in an object  Measurement of how hot or cold something is Temperature

6.  When matter changes from one state of matter to another through a loss or addition of heat, it is called a change of state  Everything is made of matter! Changes of State

7.  Read p. 47  The three main states of matter are 1. SOLID 2. LIQUID 3. GAS Changes of state

8. SolidLiquidGas Shape Volume Particle movemen t Particle spacing Prepare a table like this

9.  Solids have a definite shape and a definite volume  Particles in a solid do not move very fast and are very close together; they vibrate in place  A solid that absorbs heat will cause it to melt  A solid that absorbs an extreme amount of heat will cause it to sublimate Solids

10.  Liquids do not have a definite shape, but do have a definite volume  Particles in a liquid are further apart than a solid and move a lot quicker  A liquid that absorbs heat will cause it to vaporize (evaporate)  A liquid that releases heat will cause it to freeze (solidify) Liquids

11.  Gases have no definite shape or volume  The particles in a gas are very far apart and move very quickly  A gas that releases heat will cause it to condensate  A gas that releases and extreme amount of heat will cause it to go through deposition Gases

12. Changes of State (draw this) freezing

13.  Florida Science Grade 7, Glencoe Science & McGraw Hill Publishing  Pearsonsuccesnet.com eText  Google Images  YouTube.com Resources

14.  https://www.youtube.com/watch?v=qJRxYBIfZl E https://www.youtube.com/watch?v=qJRxYBIfZl E https://www.youtube.com/watch?v=qJRxYBIfZl E  https://www.youtube.com/watch?v=Gxwj24mR EyA (Bill Nye episode) https://www.youtube.com/watch?v=Gxwj24mR EyA https://www.youtube.com/watch?v=Gxwj24mR EyA Extra links