Each group needs:

• a box of food coloring
• 1 rectangular glass container or vase (no smaller than 15 cm x 10 cm x 8 cm or 6 in x 4 in x 3 in; available at hobby or craft supply stores)
• 5 small disposable cups (preferably transparent)
• marker (to label cup contents)
• ¼ cup (59 ml) isopropyl alcohol
• ¼ cup (59 ml) shampoo (Pantene Pro-V recommended)
• ¼ cup (59 ml) strawberry syrup (Hershe's brand syrup recommended
• ¼ cup (59 ml) corn syrup
• ¼ cup (59 ml) cooking oil
• ½ cup (118 ml) ketchup
• ½ cup (118 ml) chocolate syrup
• 1 clear 8 oz (.24 l) drinking glass
• 1 spoon or mixing rod (or a small supply of plastic spoons or stirrers)
• 3 sheets white paper
• tape (to affix white paper securely to wall and tabletop)
• pencils (for completing the worksheets
• Student Instructions Handout, one per group
• Density Rainbow and the Great Viscosity Race Worksheet one per person

Note: Narrower beakers can be used, and amounts reduced proportionally. Try to maintain about a one-inch depth for each layer.

Note: All materials can be poured down the drain for disposal.

To share with the entire class (optional):

• camera, of any type
• black cardboard or fabric for photograph background. 2 ft X 2 ft (or .6 m x .6 m)
• 60 Watt clip-type light or equivalent