Chapter 4'1textbook p' 1031081908

1
Chapter 4.1 textbook p. 103-108 1/9/08

• kinetic theory of matter all particles (atoms)
  of matter are always moving
• solid
• vibrate back and forth
• held together by forces of attraction
• liquid
• move freely
• slide past one another
• gas
• far apart
• move easy

Ch 1.4
2

• temperature average amount of kinetic energy
• particles moving fast high average kinetic
  energy high temperature (hot)
• Particles moving slow low average kinetic
  energy low temperature (cold)

Illustrations E\McDougal Littel Power
Presentations\Physical
Illustrations E\McDougal Littel Power
Presentations\Physical
hot liquid
cold liquid
3

• degrees equal spaces (steps) between two
  points, used to measure temperature, ()
• F degrees Fahrenheit
• water freezes _at_ 32 F
• water boils _at_ 212 F
• C degrees Celsius
• water freezes _at_ 0 C
• water boils _at_ 100 C
• thermometer device used to measure temperature

Illustrations E\McDougal Littel Power
Presentations\Physical
4

• thermal expansion all gases, many liquids, and
  most solids expand (get bigger) when temperature
  increases

www.upscale.utoronto.ca
Railroad tracks distorted because of thermal
expansion on a very hot July day.
Engineers had to account for thermal expansion to
put in the last piece of the St. Louis Arch.
Created by Chad Belling