SPH3U1
6.1 Warmth and Coldness
Read section 6.1
Kinetic Molecular Theory – All matter is made up of
Three States of Matter:
Solid
-strong forces hold vibrating
atoms close together
-particles only move within
a
Liquid
Gas
-medium force holding
atoms together
-the particles are able to
-very week force holding
atoms together
-particles can move
Thermal EnergyThe faster the particles are moving 
the more particles there are 
Temperature(
Thermometer is
How does it work?
Temperature scales:
Celsius scale – based on
Fahrenheit - based on
Kelvin – based on
-developed using absolute zero 
Water Boils
Water freezes
Absolute zero
Tk = TC + 273
Celsius (°C)
100
0
-273
and
Kelvin (K)
(no degree)
0
TC = TK - 273
The SI unit for temperature is Kelvin (k).
The Kelvin scale was calibrated to put zero at the (lowest possible temp).
The size of one Kelvin is equal to one degree Celsius.
Substances increase in temperature when they absorb thermal energy (warm up)
Substances decrease in temperature when they release thermal energy (cool down)
Today’s Work: Complete p. 274 # 1-4