1. Agenda Bell Work
In the chart below fill in one difference and
one similarity that you came up with:
• Notes: Intro to Similarity Difference
Thermal Energy Hot Cup of
Coffee
• Temperature
Research and
Calculations
Cold Cup of
• HW: Chp 9 pg Coffee
136-143
• Review Q’s 1-20
3. Objectives
1. Explain the motion of molecules in the
different states of matter
2. Understand the definition of thermal
energy and what happens in thermal
equilibrium
4. Movement of atoms
• All matter is constantly moving
• Moving particles determines whether an
object is solid, liquid, or gas
5. Kinetic Energy
• The warmer an object is the more kinetic
energy it has
= more thermal energy
7. Hot or Cold
• Temperature
• Thermometer measures temperature by
expansion or contraction of a liquid
Eureka 20
8. Temperature
• Related to the random motion
of atoms and molecules
• average kinetic energy of
molecules
9. • Thermometers read their own temperature
• Energy flows between the thermometer
and the object until they reach an equal
temperature
• This equilibrium is called a Thermal
equilibrium
10. Flow of Thermal Energy
• From a warmer substance to a colder
one
• HEAT – thermal energy in motion
11. Upper Limit of Temperature
Solid Liquid Gas
What happens after the Gas state?
Plasma – Cloud of electrically charged
particles
- stars, millions of degrees C
12. What’s cold?
• The absence of thermal energy
• An object is cold because of the loss
in thermal energy
• Eureka 21
13. Heat
• Measured in Joules
• 4.2 Joules = heat to change 1 gram of
water 1 Celsius degree
14. c alorie
• Unit of heat used in the United States
• Amount of heat needed to change 1
gram of water 1 Celsius degree
• c = Mass (Change in temp)
• 1 c alorie = 4.2 joules
15. • Energy ratings of food and fuels are
measured by the energy released
when they are burned
• Kilo calories = C alories we know on
food packages (capitol C)
16. • To the Weight Watcher, the peanut
contains 10 C alories
• To the physicist, it releases 10,000
c alories of energy when burned or
digested
