Name of Investigation - 1st Law of Motion - Inertia

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Answer: A balloon grows bigger because of the air you blow into it. The air that you blow into the balloon pushes out on the balloon walls. You are increasing air and the air pressure inside the balloon. There is also air on the outside of the balloon pushing in. When you remove some of the outside air (that’s air inside the chamber), you have changed the pressure on the inside and outside of the balloon. It is easier for the inside air to push the balloon walls outward because there is more pressure on the inside of the balloon than there is on the outside of the balloon and the balloon expands. Decreased pressure. Increased pressure Marshmallows Now place fresh large marshmallows inside the vacuum pump. What will happen to the marshmallows?
1. Place the cap and plunger on top of the vacuum pump. Pull the plunger repeatedly. The plunger will take air (and thus air pressure) out of the chamber. So will pressure increase or decrease?_________________________________ 2. What happened to the marshmallows? 3. Compare the marshmallows inside the chamber to a marshmallow from a regular marshmallow from the bag. Describe the difference. 4. Why did this happen to the marshmallow in the chamber? 5. Now release the vacuum seal and allow air back into the chamber. Will the pressure increase or decrease? _____________________________________ 6. Predict what will happen when the vacuum seal is released. 7. Describe the marshmallow now. Shaving Cream Now put another colloid into the vacuum pump. Squirt shaving cream into the chamber and repeat the procedure as you did with the marshmallows. Hypothesis What do you think will happen to the shaving cream when you decrease the air pressure?
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Name of Investigation - 1st Law of Motion - Inertia

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