Students tilt the bag and see that the liquids move down the plastic at different rates. Finally, students see a demonstration in which a drop of food coloring is placed in each liquid and students ...

Did you know that there are quite a few other applications of food ... colorings, plastic bottles a spatula and a frying pan.

Add 1 drop of red food coloring to the hot water and gently mix. Pour room temperature water into a taller clear plastic cup until it is about ¾-full. Your adult partner should use a dropper to pick ...