milk, food coloring, and a drop of liquid soap.
|The materials for this week's science experiment: milk, soap (in the cup) and food coloring.|
|Have fun. Try all different colors and sizes of drops.|
|The secret of the bursting colors is the chemistry of that tiny drop of soap.|
|Dish soap weakens the chemical bonds that hold the proteins and fats in the milk.|
|The molecules of fat bend, roll, twist, and contort in all directions |
as the soap molecules race around to join up with the fat molecules.
|During all of this fat molecule gymnastics, the food coloring molecules are bumped and shoved everywhere, |
providing an easy way to observe all the invisible activity.
|As the soap becomes evenly mixed with the milk, the action slows down and eventually stops.|
|This is why milk with a higher fat content produces a better explosion of color - there's just more fat to combine with all of those soap molecules.|
Watch the video.
Don't forget to email pictures of bees this week!