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Ingenium Canada Science and Technology Museum

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Imploding Can

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Open 9 a.m. to 5 p.m., Tuesday to Sunday
Address
1867 St Laurent Blvd, Ottawa, ON
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Browse all Visitor Information for Canada Science and Technology Museum
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Imploding Can

Imploding can
Download activity PDF

You might not be able to feel it, but air actually has a lot of weight pushing down on us. See what happens when you create a soda can that can’t fight back against this pressure — and be sure to bring your earplugs!

What you need

  • Empty soda can
  • Bowl
  • Cold water
  • Ice
  • Gas burner or Bunsen burner
  • Tongs

Safety first!

When experimenting with fire, always make sure that there is adult supervision and help. You must have extinguishing materials (a fire extinguisher or blanket) nearby, in case there is an accident.

Make it

  1. Put a spoonful of tap water into the can. The exact amount is not important.
  2. Fill your bowl with cold water. Add ice as well.
  3. Place the can on the gas burner, or use the tongs to hold it over a Bunsen burner. Turn it on.
    WARNING: Only adults should be doing this step. Make sure you have an extinguisher nearby and that nobody touches the burner while it’s on.
  4. Wait until you hear the water boiling inside and see steam coming out. Wait about 30 seconds.
  5. Turn the burner off.
  6. Pick up the can using the tongs. Keep in mind that you will momentarily be flipping it upside down, so hold it in a way that makes turning it over easy. Make sure that you have a good grip on it.

Test it

Pick up the can, and quickly flip it upside down into the bowl of water. You will hear a loud noise and the can will be crushed into itself!

Explain it

When you heated up the water inside the can, it evaporated. The water vapour created pushed out the air that used to be in the can, and some of the vapour escaped as well. The remaining gas then became all that was taking up space in the can.

When you plunged the can into the cold water, the water vapour rapidly condensed (changed from a gas to a liquid). The amount of gas left only was enough to become a very small amount of water. Because you have blocked the hole at the top by plunging it into water, no air can enter to fill up that empty space. This leaves the pressure in the can to be lower than the pressure of the air and water around it. The force of this pressure is what pushes the can inward, crumpling it.

Observe it

When people go deep-sea diving, they have to go in a pressurized chamber that mimics the pressure on land. The weight of all that water makes the deep sea an extremely high pressure environment, and without protection, the gases in their bodies would compress so much that they would be crushed. They wouldn’t completely implode though, as most of the human body is made of water which cannot be compressed.

Go further

You will have probably noticed that the can is filled with water soon after you submerged it. Can you figure out why? Think about the fact that the air exerts pressure on the bowl of water.

Imploding can materials
Imploding can step 3
Imploding can step 6
Imploding can - testing it

Program Details

SCITECH
Canada Science and Technology Museum
Duration
20 minutes
Difficulty Level:
Hard
Program Location
Online
  • View all programs at the Canada Science and Technology Museum
  • View other programs related to Sciences, Household Technology

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About Canada Science and Technology Museum

Canada Science and Technology Museum
The Canada Science and Technology Museum tells Canada's innovation story in an immersive, educational, and fun way.
Read more about the museum

Contact Us

Canada Science and Technology Museum
1867 St Laurent Blvd
Ottawa ON K1G 5A3
Canada

613-991-3044
1-866-442-4416
contact@IngeniumCanada.org
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  • Plan Your Visit
    • Health and Safety
    • Hours
    • Admission
    • Location and Directions
    • Accessibility
    • Browse All Visitor Information
    • Buy Tickets
    • Online Resources for Science at Home
    • About the Museum
  • What's On at the Museum
    • Events
    • Exhibitions
    • Spaces and Studios
  • Bookings and Rentals
    • School Programs
    • Birthday Parties
    • Summer Camps
    • Venue Rentals
    • Travelling Exhibitions
    • Virtual Field Trips
    • Group Visits
  • Educational Programs
    • School Programs
    • Virtual Field Trips
    • Program Location
      • At the Museum
      • At Your School
      • Online
      • Browse all Educational Programs
    • Popular Links
      • 3D Educational Resources
      • Digital Learning Kits
      • Games and Apps
      • Online Resources for Science at Home
      • Tell Me About
      • Try This Out
  • Collection and Research
    • Research Institute
    • Research Projects
    • Collection Resources
      • Ingenium Collection
      • Collection Highlights
      • Conservation and Collection Services
    • Library and Archives
      • Library and Archives Services
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      • Digital Archives
    • Open Access
      • Ingenium APIs
      • Open Data
      • Open Documents
  • Projects and Initiatives
    • Ingenium Channel
    • Curiosity on Stage
    • Women in STEM
    • Innovation Storybook
    • Species at Risk in Canada
    • Climate Science