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What causes wind (Hot air rises) – Weather

By | 2017-08-20T17:32:03+00:00 August 20th, 2017|Physics|

Hot air balloon When something is hot, its molecules are farther apart than when it is cold. When air is hot, its molecules are further apart, so it takes up more room. That makes hot air lighter than cold air, because the cold air has more molecules in the same amount of room. On Earth, air that is [...]

What’s the equator? Geography and the Earth

By | 2017-08-20T17:15:49+00:00 August 20th, 2017|Physics|

This globe shows the equator running around the widest part of the Earth. The equator is an imaginary line running around the widest part of the Earth, halfway between the North Pole and the South Pole. So if you are north of the Equator, you're in the Northern Hemisphere. And if you're south of [...]

Tornado in a bottle – Weather science project

By | 2017-08-20T17:05:57+00:00 August 20th, 2017|History, Physics|

A tornado in a bottle You can make your own tornado to see how it works. Fill a one or two liter bottle, like a soda bottle, with water. Add a bunch of glitter to help you see the tornado more clearly. Put the top on the bottle. Now swish the bottle around a bunch to [...]

Thermometer projects – Temperature science

By | 2017-08-20T14:57:02+00:00 August 20th, 2017|Physics|

See how the degrees match up. To prove to yourself what temperature water freezes and boils at, fill a pan with ice from the freezer. Stick a thermometer in it (not a fever thermometer! Use an outside thermometer for the freezing part and a candy thermometer that goes up as high as boiling water for the boiling part) [...]

Why is the sky blue? A science project

By | 2017-08-20T14:53:06+00:00 August 20th, 2017|Physics|

A cloudy glass of water You can see for yourself that blue light scatters more than red light. This is the same way that John Tyndall showed why the sky was blue in 1859. Fill a drinking glass with water, and then add two spoonfuls of milk - almond milk is okay if you are dairy-free [...]

Sunny but cold – Seasons – Science projects

By | 2017-08-20T14:49:04+00:00 August 20th, 2017|Physics|

Still in their coats on a sunny day(Thanks to [seattle + beyond]) To see what a difference it makes whether sunlight hits the Earth directly or at an angle, just think about a sunny day in summer and a sunny day in winter. In summer, when the sun is out it soon gets very hot. Even cloudy days, when the sunlight has to come [...]

Rain project – Weather science

By | 2017-08-20T14:33:42+00:00 August 20th, 2017|Physics|

People driving cars in the rain Some of the tiny particles inside the clouds - the cloud seeds - are made of pollution from cars and factories. They're little particles of carbon from burning gas, or other pollutants. Because people drive more on weekdays than on weekends, there is more and more pollution [...]

Kleenex balloon – Hot air rises project

By | 2017-08-20T13:52:18+00:00 August 20th, 2017|Physics|

Making your own hot air balloon (Thanks to American Aircraft Modeler) You can make your own tiny hot air balloon to see how hot air rises and then cools down and sinks again. Take a Kleenex tissue or some toilet paper and glue the edges to a circle of light string with tiny [...]