Mix a Rainbow

Good evening scientist! My little scientist and I just mixed up a fun rainbow. It is a great investigation to learn how colors are formed.

Materials

Mix a Rainbow (1)

6 Small Cups (We used Condiment Containers)

1 Teaspoon Measuring Spoon

Food Dye: Red, Yellow, and Blue (Gloves if you are worried about staining your hands)

Optional: 6 Slips of Scrap Paper Labeled 1-6

Optional but Recommended: Waterproof Paint Shirt or Apron

Investigation

  1. Fill cups 1, 3, and 5 about 2/3 of the way up with water.
  2. Add 2 drops of red food dye to cup 1.Mix a Rainbow (8)
  3. Add 2 drops of yellow food dye to cup 3.Mix a Rainbow (9)
  4. Add 2 drops of blue food dye to cup 5.Mix a Rainbow (10)
  5. Using a teaspoon measuring cup, have your little scientist add equal scoops of red (cup 1) and yellow (cup 3) to your number 2 cup. We used 3 of each.Mix a Rainbow (14)
  6. Using a teaspoon measuring cup, have your little scientist add equal scoops of yellow (cup 3) and blue (cup 5) to your number 4 cup. We used 3 of each.Mix a Rainbow (16)
  7. Using a teaspoon measuring cup, have your little scientist add equal scoops of red (cup 1) and blue (cup 5) to your number 6 cup. We used 3 of each.Mix a Rainbow (19)
  8. Enjoy your rainbow: red, orange, yellow, green, blue, purple.Mix a Rainbow (22)
  9. Optional: My little scientist wanted to continue the fun and try mixing up the rainbow colors into different combos to see what new colors he could make.

Talking Points

In this investigation we used the three primary colors red, yellow, and blue to make all other colors. Primary colors are special because using them you can make the other colors of the rainbow, but you can not make the primary colors by mixing the others together. We made the secondary colors: orange, green, and purple. Secondary colors are made by mixing two of the primary colors.

1 thought on “Mix a Rainbow”

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