Rainbow

Science Experiement

Red, blue and yellow are called the primary colors. Just by mixing these colors, you can get all the colors of the rainbow:

RED + YELLOW = ORANGE

RED + BLUE = PURPLE

BLUE + YELLOW = GREEN

What you need:
-red, blue and yellow food color
-1 cup milk
-dishwashing liquid
-shallow bowl or plate

What to do:
-Pour 1 cup of milk into the bowl
-Add 3 drops of red food color to one edge of the bowl
-1/3 of the way away, add 3 drops of blue food color
-1/3 of the way away add 3 drops of yellow
don't mix or jiggle the bowl

-Squeeze a drop of dish soap in the center of the bowl

What I saw:
The colours swirled and made lots of patterns.

What Happened:
The dishwashing liquid does not mix with the milk. Instead it floats on top and spreads over the surface. As it spreads, it grabs the food color we dropped into it. Where the colors meet, they combine to form new colors:

RED + YELLOW = ORANGE

RED + BLUE = PURPLE

BLUE + YELLOW = GREEN