1. Vocabulary 1. Chemical Reaction 2. Product 3. Reactant

2. Electrolysis: using electricity to break up a compound into its elements Water (DC current) Hydrogen gas + Oxygen gas H 2 O (DC) H 2 + O 2. (needs to be balanced) Direct Current (DC) ElectricityTo break

3. O  element/atom oxygen O 2  1 molecule of oxygen gas H  element/atom H 2  1 molecule of hydrogen gas H 2 O  1 molecule of water 2H 2 O (DC) 2 H 2 + O 2. Balance: Reactants Products 4 – H4 – H 2 – O2 – O

4. Electrolysis of Water OxygenHydrogen

5. How can we test the gases collected? Hydrogen Gas – “Pop test” Oxygen Gas – “Re-ignition test”

6. How does a battery work?

7. Natural Forms of Energy A. UV radiation B. Lightning C. Radioactive rocks D. Volcanoes