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# Pressure

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Hoopman Science
Contract 24

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### Pressure

1. 1. Gwen Nytes
2. 2.  Pressure-Force applied to an object The amount of pressure depends on the depth and density of the object’s surroundings
3. 3. Egg in a Bottle
4. 4.  Show changes in pressure
5. 5.  Hard boiled egg (no shell) Matches Bottle Bundle of paper Scale
6. 6.  Put the bottle and all of the materials being used on the scale and measure the weight. Light the paper and drop it into the bottle. Immediately put the egg on the mouth of the bottle When the egg is in the bottle, turn the bottle upside down so that the egg is on the neck of the bottle. Tip your head back, put your mouth over the opening and blow hard into the bottle. Remove your face from the bottle and hold it upside down. Observe what happens
7. 7.  When the burning match is in the bottle and you put the egg on top, it cuts off all of the oxygen coming in. When the match burns it uses oxygen and gives off carbon dioxide and water. In the jar, with no oxygen remaining and just water in there, the egg will fall in, because water is less dense than the surrounding air. When you blow in, you increase the pressure inside the bottle, so when you take your mouth away, the egg falls out.
8. 8.  When you measure the weight and the materials before the experiment and weigh them again when your done, you will find that it got lighter. This is because the oxygen was giving it the original density, and when the oxygen went away, it got lighter.
9. 9.  Newton’s 3rd Law – For every action there is an equal and opposite reaction Newton’s 3rd law relates to this activity, because when you change the pressure inside the bottle, it causes the egg to fall in and come out.