In this issue:
- Candy Coating Science Project
- Fun Facts
- Silly Science
- Way Cool Websites
This time of year, many families in the U.S. end up with a whole haul of Halloween candy. Part of scientific investigation involves looking at things in new ways. This year, instead of eating all that candy, use some of those sweet treats in an easy science experiment.
Candy Coating Science Project
Liquids that can dissolve solids are called solvents. Things dissolved in a solvent are called solutes. In this experiment, you’ll use a solvent (water) to dissolve the colored coating on candy (solute).
What You Need:
- M&Ms® or Skittles®
- Petri dish, paper plate, or another shallow container
- Hot and cold tap water
What You Do:
- Fill the petri dish with enough cold water to fully cover one M&Ms or Skittles.
- Carefully drop the candy in being sure not to disrupt the water too much. If you can, drop the candy so it lands with its letter facing up.
- Start your stopwatch and notice how the candy looks after 30-second intervals.
- Write down or draw your results.
- Repeat the experiment with hot water.
Water is often called the universal solvent because, given enough time, it will dissolve just about anything. What happened when you used hot water versus cold water in the experiment? You probably found that hot water dissolved the candy coating faster. That’s because the molecules in hot water move faster than those in cold water. Since faster-moving molecules have more energy, they can dissolve the solute more quickly.
For further study, try using different candies and/or different solvents, like milk, saltwater, or vinegar. How do your results change? What about if you stir your solvent after you drop the candy in? How does agitation affect your results?
If you dropped your candy very carefully and didn’t disturb the water afterward, you may have noticed the white “M” or “S” floating in the water. That’s because the ink used to stamp the letter on the candy is not water-soluble. So although it’s safe to eat, it’s a solute that doesn’t dissolve in water.
Way Cool Websites
- Identify the candy bar by its cross-section in this fun online game.
- Find out how different candies are made with the Candy-o-matic from Exploratorium.
- Watch a slideshow of Halloween candy through the years.
- The first branded chewing gum was made from tree sap in 1848 and was called The State of Maine Spruce Gum.
- Tootsie Rolls were named after their creator’s daughter–Tootsie was her nickname!
- Hershey, Pennsylvania, home to The Hershey Company, maker of chocolate bars and kisses, was renamed in 1906. Before then, it was Derry Church.
- What do you call a cow that can’t moo?
- A Milk Dud.
- What’s a leopard’s favorite candy?
- What candy do you eat on the playground?
- Recess Pieces.