Saltwater Gummi Soak

The kids will get a lesson about osmosis with this science experiment using gummi worms!

Time: Two days
Skill Level: Medium

Supplies
4 gummi worms or other gummi candy
3 small clear bowls, each with 1 cup of water
Sugar
Salt

Directions
1. Add a spoonful of sugar to one bowl of water, and a spoonful of salt to another bowl of water.
2. Put a gummi candy in each bowl (set extra gummi candies aside for comparison).
3. After several hours, check the gummi candies to see what size they are. Which ones have changed the most?

What’s happening:
A cup of fresh water is a dilute solution. When you put salt in water, you make a concentrated solution. The more salt, the more concentrated the solution is. If water can pass from a dilute solution into a concentrated one, it will. Nature is trying to make the two solutions equally concentrated. This process is called osmosis.

You can see osmosis in action when you put a gummi worm in fresh water. Water flows into the gummi worm, diluting the sugary gelatin mix (a concentrated solution). The gummi worm expands. But if you put a gummi worm in salt water, the salt water is already concentrated. Not as much water is needed to dilute the gummi worm, so it will expand less. Depending on how concentrated your solution is, it might not expand at all.

Osmosis is also the process that draws water into plant roots and up where it’s needed. If you watered plants with salt water, the plant cells wouldn’t be able to absorb any water, just like the gummi candies.

Science fair ideas
Mix up different solutions with different substances and put a gummi worm in each. Predict which gummi worm will expand the most and which will expand the least.

----------

Find more experiments and science fair ideas in the book, Candy Experiments 2 by Loralee Leavitt/Andrews McMeel Publishing, LLC.

Pubished: February 2015




Candy Chromatography

Candy Chromatography

Many science experiments involve candy. Follow the directions below to find out how you can use science to determine how candies get their colors. Materials:Coffee filtersClear jars or cupsPencilTap . . .

Read more

Bouncy Ball Science

Bouncy Ball Science

Take me out to the ballgame! March is the time of year when baseball players head to spring training to practice pitching, hitting and fielding. If baseball is not your thing, you can have fun by maki . . .

Read more

Popcorn Pop Rocks

Popcorn Pop Rocks

Help the kids make scientific discoveries at home with candy. With a little hot water, you can make these Pop Rocks really pop!Time: 10 minutesSkill level: Get a grown-upSuppliesPop RocksHot water (ab . . .

Read more

Kitchen Chemistry Science for Kids

Kitchen Chemistry Science for Kids

While you are enjoying your hotdog or hamburger this summer, take a closer look at the bun. Do you notice tiny holes or air spaces in the bread? Where did these holes come from? You might not believe . . .

Read more

Full STEAM Ahead

Full STEAM Ahead

Fun, engaging STEM opportunities abound for San Diego families. Find ways to be a citizen scientist in your community, websites that make math and science fun and science opportunities just for girls. . . .

Read more

Warty Licorice

Warty Licorice

Can you make a smooth piece of licorice grow warts? Do this science experiment with the kids to find out!Time: 5 minutesSkill level: Get a grown-upSuppliesTwizzlers licorice twists (the Pull-n-Peel va . . .

Read more

San Diego Family Magazine Logo

Be Family Informed – Sign up for our Newsletters below!