Science project
Glove In a Jar: Demonstration of a Closed System
Grade Level: Kindergarten to 2nd grade; Type: Physics
Objective:
Demonstrate the relationship between the amount of stuff and the amount of pressure in a closed system.
Research Questions:
Because the rubber glove is stretched tightly around the rim of the jar not allowing anything - including air - to get in or out, the glove-in-the-jar is a closed system. The jar is completely filled with the glove and air. What happens when you try to put your hand into the glove in the jar?
Materials:
- One glass jar large enough to put your hand into (a big maraschino cherry jar from a bar works well)
- One thick rubber glove (like the ones for washing dishes)
Experimental Procedure:
- Put your hand into the glove. How does it fit?
- Take off the glove and hang it into the jar with the fingers pointing down.
- Stretch and fold the wrist-edge of the glove over and around the rim of the jar.
- Now try to put your hand into the glove. How does it fit? it’s difficult because there’s no room left; the jar is already full! If you really try you can do it, but it’s hard – you feel a lot of pressure. You have to squish the air in the jar to make room for your hand.
Terms/Concepts: Closed System, Pressure
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Warning is hereby given that not all Project Ideas are appropriate for all individuals or in all circumstances. Implementation of any Science Project Idea should be undertaken only in appropriate settings and with appropriate parental or other supervision. Reading and following the safety precautions of all materials used in a project is the sole responsibility of each individual. For further information, consult your state's handbook of Science Safety.
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