To share with the entire class:

• 20 sets of bolts, nuts and washers
• 9 plastic dishes
• tape and marker, to number dishes
• four examples of elements:
• aluminum (one small sheet of foil)
• copper (a small piece of wire or tubing)
• iron (filings or a magnet)
• carbon (in the form of a pure carbon pencil or graphite)
• four examples of compounds:
• water, or H₂0 (~100 mL)
• table salt, or NaCl (~10g)
• baking soda, or NaHCO₃ (~10g)
• eggshell or a seashell, or CaCO₃
• four examples of mixture, both homogeonous and heteogenous:
• inflated Ziploc bag (as an example of air)
• bottle of Coke or other soda
• salad dressing (such as a vinegarette made of oil and water)
• salt water
• Data Table, one per student