What Makes a Hot Air Balloon Float?

What Makes a Hot Air Balloon Float?

It’s one of those basic rules we grow up hearing: hot air rises and cool air sinks, but why is that? If you’ve seen our piece on buoyancy, you know that density is one of the key factors in whether an object sinks or floats in a given substance, but a substance’s density doesn’t have

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DIY Density Column

DIY Density Column

We know that density depends on mass and volume of a substances. We can easily see differences of density when comparing anything to the air in our atmosphere. But what about common liquids compared to each other? Lucky for you, that’s exactly what we did. In this DIY experiment we poured seven liquids into one container

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Will it float? Experimenting with Density

Will it float? Experimenting with Density

Have you ever wondered exactly why a boat floats or why rain falls down and not up? It all has to do with density! Density is a measure of how much mass there is in a given volume, or rather how much stuff you have in a certain place. It determines whether something sinks or

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Wrap Your Head & Hands Around Density

Wrap Your Head & Hands Around Density

Heat rises, boats float, clouds hang listlessly in the sky, and icebergs aimlessly bob around the ocean. All of these things happen because of the same scientific property: density! Density is a rather simple property. It depends on two things, mass and volume. Mass is basically how much something weighs, but something still has the

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Discovering Density with Liquid Nitrogen

Discovering Density with Liquid Nitrogen

Why does water form lakes and oceans underneath a vast expanse of airy sky? The answer to that, and many more questions, is density! Density is most easily described mathematically by the following equation: This means that density depends on only these two quantities: Mass, or the amount of matter that something is made up

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Tabletop Rockets Science

Tabletop Rockets Science

Temperature is a measure of energy. Adding energy to a substance makes it hotter; removing energy makes it colder. Warm, energetic molecules move faster and farther, spreading out over a larger volume of space. This balloon has been cooled to hundreds of degrees below zero (Fahrenheit), condensing the gas molecules inside. At room temperature, the

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Stacking Liquids with the Density Column

Stacking Liquids with the Density Column

 Why do these liquids stack so cleanly? For the same reason that helium floats on air, and air floats on water: it’s all about density. Density, or mass per volume, measures how much stuff is squeezed into a given space. The higher the mass-to-volume ratio, the denser the object. A ten-gallon bucket of rocks

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Paperclip Science!

Paperclip Science!

Today is National Paperclip Day! Yes, even those simple bits of bent wire have their very own day. Being a science camp, we decided to celebrate in the only way that made sense: Paperclip science! Lets start with a simple question. How can you tell if something will float? The most common and simple answer

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