Galactic Hot Dogs
 
|

Amazing Inflating Balloons

Both chemistry and cooking are about combining ingredients to create something completely different. In cooking, certain ingredients, such as yeast and sugar, are vital to the finished product because of the chemical reaction they produce when they're combined. This activity demonstrates how yeast works.

Materials

  • 3 tablespoons sugar
  • 1/2 cup warm water
  • 3 small packages active dry yeast
  • One empty 1-quart soda or juice bottle
  • Balloon
  • Rubber band

Directions

  1. Have your child dissolve the sugar in the water.
  2. Stir in the yeast, then pour the mixture into the bottle.
  3. Stretch the opening of the balloon over the mouth of the bottle and secure it with the rubber band.
  4. Set the bottle in a warm place, such as on top of your refrigerator.
  5. In a while, the balloon will inflate. Why?
  6. The yeast cells are eating the sugar, and as they do so, they produce a gas called carbon dioxide. Carbon dioxide is heavier than oxygen, so it pushes the oxygen in the bottle up and into the balloon. The same happens with yeast used in cooking. In that case, the release of carbon dioxide helps dough rise.

|

Copyright 2001 by Patricia Kuffner. Excerpted from The Children's Busy Book with permission of its publisher, Meadowbrook Press.

To order this book visit Meadowbrook Press.


stay connected

Sign up for our free email newsletters and receive the latest advice and information on all things parenting.

Enter your email address to sign up or manage your account.

Facebook icon Twitter icon Follow Us on Pinterest

editor’s picks

highlights

The Latest and Greatest Book for Kids
Search our interactive Book Finder for the top new books for kids of all ages, brought to you by the latest book in the I, Funny series, "I Totally Funniest."

Kindergarten Readiness App Wins Gold
Our Kindergarten Readiness app won the Gold Award of Excellence in the educational category at the 2014 Communicator Awards. This valuable checklist comes with games and activities to help your child practice the essential skills she needs for kindergarten. Download the Kindergarten Readiness app today!

Top 10 Wintertime Neighborhood Games
Who says you have to stay inside when the temperature drops? Snowy weather is a great excuse to round up your neighborhood for some outdoor winter fun and games.

2015 Family-Friendly Oscar Nominees
The Oscar nominations are in, and they include several family-friendly movies. See which flicks earned a nod for Best Animated Feature Film and other awards.