Login Become a Member Contact Us. Procedure Put about two tablespoons of water in an empty aluminum can. If one is available, use a can that has already has the word "Crush" on it. Explanation This demonstrates phase change and the effect of unbalanced pressure. Suggested Audience Since there is a loud sound, this may not be ideal for groups of children that are younger than kindergarten-aged. Follow Us. This brief guide will provide you with the information you need to make a number of solutions commonly used in educational laboratories.
In this activity, students engage in a game of beanbag toss—but instead of merely keeping score, they explore statistical concepts such as mean, median, mode, and range. This author provides an excellent student lab-report format, explains how it adapts to different science disciplines, and suggests simple labs to familiarize students with it.
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Feeling the pinch from the current economy? Carolina understands. Mike Isley Product Developer. One of the most popular teacher demos to illustrate the power of atmospheric pressure is to heat to a boil a small amount of water in an aluminum beverage can, then quickly submerge its mouth in an ice water bath.
Students can do this activity as a quantitative guided-inquiry exercise to show the relationship between temperature, pressure, and volume of gases. Atmospheric pressure at sea level is This would be the amount of pressure exerted on the outside of any empty beverage can. Since the can is open, the air pressure on the inside of this can is the same as the outside pressure.
Therefore, the equilibrium of pressures enables the can to maintain its shape. When a small amount of water 20 mL is added to the can and brought to a boil with a hot plate or Bunsen burner, the water changes into water vapor, driving out all of the air in the can and occupying all of the inside volume. When the can is quickly inverted and placed mouth down in an ice water bath, the water vapor molecules slow down and condense back into liquid water.
As a result, the gas volume and pressure inside drops suddenly, creating a partial vacuum. With the drop in pressure inside the can and the atmospheric pressure remaining constant outside it, the imbalance of pressures causes the walls of the can to dramatically collapse. Journal of Chemical Education 86 4 : — We use cookies to provide you with a great user experience. By using our site, you accept our use of cookies. You can review our cookie and privacy policy here.
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New - Life Science Browse the latest tools and resources for life sciences at Carolina. Biotechnology For a quarter century, Carolina Biological Supply has been committed to bringing biotechnology into the classroom. Building Blocks of Science Building Blocks of Science Elementary Curriculum offers kits that are affordable and easy to implement in your classroom. Top Categories Chemicals Choose from over chemical products in chemical grades, sizes and concentrations to meet your needs.
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View all Life Science. Physical Science Make your classroom electrifying with activities and information spanning chemistry and physics content. View all Physical Science. Imploding Soda Can. As the gas in a pop can suddenly condenses, the pressure drops enough to crush it! Random Demo "Seeing" an Endothermic Reaction.
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