2 baby food jars
Food coloring or bio colors (red & blue
or blue & yellow)
Card stock (3x5 index card)
Work over a sink or sensory table in case of
one jar with hot water
second jar with clod water
the other color of food coloring
more hot water to the first jar until it is even with lip of jar
card stock over jar with hot water
it in place (you want the card stock wet to form the seal)
jar over quickly keeping card in place (hot water jar)
on top of cold water jar
The card will prevent the water from spilling out
~~ Have an adult hold the jars still
~~pull out card slowly
A thin purple line will show where the colors meet
The red and blue water will not mix.
~~Ask the children why the colors don’t mix?
They do not mix because hot water (like hot air) rises.
Cold water (like cold air) sinks or moves downward.
~~Ask the children what they think will happen if you put the jar
with cold water on top?