Name of Investigation - 1st Law of Motion - Inertia

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Physics With Toys student name ___________________ Name of Investigation – Balloon Pump Big Idea – Air Vocabulary Rubber gaskets Piston nozzle O-ring gasket Piston rod valves Air pressure 1. Blow up a balloon with your mouth. Blow and stop and blow and stop. What happens to the balloon when you stop? What causes the air from leaving the balloon? Observe carefully and describe what you see. 2. Blow up a balloon with a bicycle pump. Watch the size of the balloon very carefully as you pump – both the upstroke and the down stroke. What happens when you pull back on the pump? What happens when you push down on the pump? Observe carefully and describe what you see. . 3. Blow up a balloon with a balloon pump. Watch the size of the balloon– both the upstroke and the down stroke. What happens when you pull back on the pump? What happens when you push down on the pump? Observe carefully and describe what you see.
4. How are the two pumps different? Now undo the balloon pump. 1. Look at the top and bottom caps. What purpose do you think those holes have? 2. Look at the gasket in the bottom cap. Try pumping the pump and watch the gasket. Does it move? What makes it move? What is happening when it moves? 3. Now put the bottom of the pump against your cheek and try to pump it. Can you do it? 4. What’s the purpose of the gasket moving? 5. Now look at the gasket in the top of the cap. Try pumping the pump and watch the gasket. Does it move? What makes it move? What is happening when it moves? 6. Take off one of the gaskets and try to pump up a balloon. Does it work the same way? What made the difference?
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Name of Investigation - 1st Law of Motion - Inertia

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