Pressure

Sucking an egg into a bottle – heat and pressure experiment

Sucking an egg into a bottle Here's an interesting experiment that we promise you'll be talking about 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 the matches…
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Pressure

Magical inflating balloons

Magical inflating balloons One of the first things a little scientist should learn is that heat causes things to expand (get bigger) and cold causes things to contract (get smaller). Things such as air will contract and take up less room when cooled. Similarly, things will expand when they get hot. If you don't believe this, carefully observe Dad's head the next time you break one of his expensive tools (Reeko tip - observe from a distance). Ok, so Reeko's gonna save you some heartache. Rather than test this by breaking one of Dad's tools, let's try the following experiment instead. Fill the bottle with hot water. Fill the bowl with cold water. Let both sit for one minute. Then empty out the bottle. Stretch…
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