Before class preparation

• Edpuzzle: Describing the invisible properties of gas
• Read (print if possible) this handout and complete Part A)

In class activity

• Name 3 things that all fires need
• Name the things that can happen with fire
• Conduct chemical tests to identify some common gases on the basis of their chemical properties
  • Oxygen, Carbon Dioxide, and Hydrogen

If time permits

• Physical Properties: 3 states of water
• When a solid disappears, is it always a chemical change?

After class work

• What is the gas released by Alka Selter & Water? How would you test it?
• Interesting Videos:
  • Why does ice float on water?
  • Gas Tests
  • Pouring “Air”