1. 2-2 Energy All living things use energy Energy
·Ability to do work or cause change
·There are different types: electrical, mechanical, radiant, thermal, and chemical.
·Can change from form to form.
*EX. Light bulb filament. Filament (electrical) to light (radiant) to heat (thermal).

2. States of Matter 3 Phases *Solid *Liquid *Gas
All atoms and molecules are in constant motion
3 Phases
*Solid
*Liquid
*Gas

3. Solid
Tightly linked
Definite shape
Vibrate in place

4. Liquid
Not so tight
Maintains fix volume
Moves freely

5. Gas
Loose
Fits container
Move rapidly

6. Energy and chemical reactions
· CO2 + H2O  H2CO3
· 3 atoms + 3 atoms = 6 atoms. The number of atoms on each side is equal.
This reaction takes place in our blood
· The double arrow means that the reaction can take place in both directions
·CO2 and H2O are reactants
H2CO3 (carbonic acid which is good for homeostasis) is the product