This is a guest blog post written by Donna Lasinski from ThinkStretch.com. ThinkStretch.com has a freebie listing in our FREEBIE FEBRUARY event – please check it out.
Cold temperatures and freezing water can play lots of nasty tricks. Have your kids ever wondered why sidewalks crack in the winter, or why that glass soda bottle you left in the garage exploded on a cold winter night? Freezing water expands as it changes from water to ice. Try this frozen liquid experiment to see just how much change happens.
Be safe! No one wants to clean out a freezer full of exploded soda and glass!
What You Need:
- empty plastic soda bottle with a cap
- a freezer or a cold winter night
What You Do:
- Fill the bottle up with water. Leave no air in the bottle.
- Screw the lid on tight.
- Put the bottle in the freezer or outdoors (if it is below freezing) overnight.
In the morning, your water bottle should be bulging on the sides. The expanded water had nowhere to go with the lid on tight so it pushed out the sides of the bottle.
The next time you see a cracked sidewalk or a pothole in the spring, your kids will understand the power of freezing water. Water that seeped into cracks in the cement and roads during a thaw, then froze again and expanded so forcefully that the cement cracked and the asphalt crumpled!
Donna Lasinski is a mother of 3 sons and the author of the Parent Guide to Summer and creator of ThinkStretch Summer Learning Program. ThinkStretch.com also has a winter program to help prevent “brain freeze”.