hooked science 300KENTUCKY (8/23/14) — Have you ever tried to inflate a balloon in an empty water bottle?

Our "Science Guy" Jason Lindsey and a kid scientist shows us how by using a thumbtack.

INGREDIENTS

  • 2 Balloon

  • 2 Empty Water Bottle

  • Thumbtack

INSTRUCTIONS

  • STEP 1: Insert a balloon into one of the empty water bottles and pull the neck of the balloon over the outside of the bottle.

  • STEP 2: Place your mouth over the opening of the empty water bottle and attempt to inflate the balloon.

  • STEP 3: Using the thumbtack, force four evenly spaced holes around the bottom of the other water bottle.

  • STEP 4: Insert the balloon into the empty water bottle with the holes and pull the neck of the balloon over the outside of the bottle.

  • STEP 5: Place your mouth over the opening of the empty water bottle with the holes and attempt to inflate the balloon.

EXPLANATION

When you inserted the balloon into the empty water bottle, air is trapped inside the bottle. As you attempt to inflate the balloon, the trapped air inside the bottle keeps the balloon from inflating, proving air takes up space. The small holes evenly spaced around the bottom of the other water bottle, allows the trapped air inside the bottle to escape. This allows the balloon to inflate.

Go to www.hookedonscience.org for more experiments that might get you and your family “Hooked on Science.”

Jason Lindsey Hooked on Science

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