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Active Time
10-20 minutes
Total Project Time
10-20 minutes
Key Concepts
Air pressure, water pressure, surface tension

Introduction

Did you know that at sea level there are about 15 pounds of air pressing on each square inch of your body? This air is very helpful in our daily lives. For example, this layer of air helps to keep the Earth from getting inhospitably cold or hot. It can even help keep a bottle with holes in it leak-free! Try the activity to find out how.

Credits

Sabine De Brabandere, PhD, Science Buddies
This activity is not appropriate for use as a science fair project. Good science fair projects have a stronger focus on controlling variables, taking accurate measurements, and analyzing data. To find a science fair project that is just right for you, browse our library of over 1,200 Science Fair Project Ideas or use the Topic Selection Wizard to get a personalized project recommendation.

Materials

  • Sturdy plastic bottle with tight-fitting lid, 750 milliliters to 2 liters works well
  • Water, enough to fill the bottle
  • At least four pushpins
  • Work area that can get wet
  • Baking sheet with a rim
  • Sink
  • Towel or cloth for cleanup
  • Optional: food coloring
  • Optional: More sturdy plastic bottles
  • Optional: More water
    Materials needed to do a science activity that explores when holes do and do not leak.

Reviews

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Active Time
10-20 minutes
Total Project Time
10-20 minutes
Key Concepts
Air pressure, water pressure, surface tension
Free science fair projects.