Science Projects

Color Mixing!

Objective: Primary colors mix to make secondary colors

What you need:

  • Six clear containers with lids: test tubes, bottles or jars
  • Red, blue and yellow food coloring
  • Eyedropper
  • Water

To Do and Observe:

  • Fill six clear containers half way with water.
  • Put three drops of food coloring in each container making two red, two yellow, two blue solutions (three stock solutions and three mixing solutions)
  • Add a dropfull of the yellow water to the red. What color do you get? (orange)
  • Add a dropfull of red to the blue. What color do you get? (purple)
  • Add a dropfull of blue to the yellow. What color? (green).
  • What happens when you mix two secondary colors together? (brown)

What’s going on?
Primary colors (red, yellow and blue) can be used to make secondary colors (green, orange and purple). In dyes, inks, paints and pigments.

Formation of a gas!
Objective: an acid and a base react to form a gas.

What you need:

  • Wine or soda bottle with narrow neck
  • Balloon
  • Baking soda
  • Vinegar

To Do and Observe:

  • Pour a cup of vinegar into the bottle
  • Stretch mouth of the balloon as wide as you can and fill the balloon with baking soda.
  • Keeping the balloon off to the side of the bottle, stretch over the top of the bottle to form a tight seal.
  • Dump the baking soda from the balloon into the bottle and watch it expand.

What’s going on?
An acid (vinegar) and a base (baking soda) react to form a gas (carbon dioxide). When the gas forms it pushes the balloon up just like when you force the gas (air) from your lungs into a balloon to blow it up