Pressure

Sucking an egg into a bottle – heat and pressure experiment

Sucking an egg into a bottle Here's an interesting experiment. We promise you'll be talking about this one at school the next day. Find a bottle with a long, narrow neck and set it on the table.  The opening should be just small enough to keep the egg from falling inside. Boil and peel a egg. Have Mom or Dad drop 3 lit matches into the bottle (if Dad does the 'dropping' then make sure the fire extinguisher is handy). Quickly place the egg over the mouth of the bottle. What happens? The lit matches heat the air inside the bottle. When air is heated it expands (and takes up more room). As the heated air expands, some of it escapes out the bottle. When…
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Pressure

Homemade clouds in a bottle experiment

Homemade Clouds in a Bottle The clouds you see in the sky are formed when water vapor is cooled enough to form tiny water droplets. When moist, cool air rises to a higher altitude, it cools, water droplets are formed, and voila - you have clouds. In this experiment we'll duplicate this same process by causing air in a bottle to rapidly cool. Put a small amount of water into the jar. Just enough to cover the bottom. Place the glove into the jar with the fingers pointing down. Stretch the mouth of the glove over the top of the jar. Carefully insert your hand into the glove being careful not to break the seal. Pull your hand (with the glove still on it) outward…
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