Hadean Eon – Earth, Moon, proteins, RNA
In the Hadean Eon, Earth was covered with active volcanoes like this one. Why is it called the Hadean Eon? Scientists named the Hadean Eon after the Greek god Hades, [...]
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06, 2017
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06, 2017
How to build a shaduf – Ancient Egypt projects
Egyptian shaduf project This is a project you should do outside on a nice warm day, because you are going to get wet! Egyptian shaduf project A shaduf is a [...]
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06, 2017
Water and sewage in ancient China
Han Dynasty model of an outhouse (ca. 100 AD) People in China, like other people around the world, used human poop to fertilize their fields and grow more food. In [...]
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06, 2017
Metal project – Chemistry Activity
Bending a nail You can do an experiment to see that metal bends easily. Just take an iron nail and hit it with a hammer and if you don't hit it [...]
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06, 2017
What is water made of? Molecules and chemistry
A big ocean wave The first molecules of water formed out in space, about 14 billion years ago, as part of the nebula left over after an early star exploded [...]
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06, 2017
Steam and water – Simple Science – Chemistry
Swimming in natural hot springs in Iceland When water gets very hot, it boils and turns into steam. This happens at 212 degrees Fahrenheit or 100 degrees Celsius. The water [...]
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06, 2017
What is oxygen? Atoms, elements, chemistry
Diagram of an oxygen atom When a star has changed all of its hydrogen atoms into helium, it turns into a red giant and moves on to convert the helium atoms into [...]
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06, 2017
Ice, water, and simple chemistry
Ice chemistry: Perito Moreno glacier, Argentina (thanks to Argentina's Travel Guide) How water freezes into ice When water gets colder than 32 degrees Fahrenheit or zero degrees Celsius, it freezes [...]
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06, 2017
What is hydrogen? Atoms and Chemistry
A diagram of a hydrogen atom Hydrogen is the simplest kind of atom Hydrogen is the simplest kind of atom, and in the very earliest days after the Big Bang [...]
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06, 2017
Steam kettles – Chemistry project
Steam escaping from a tea kettle To see water turning into steam, boil some water in a pot. When it boils, do you see the steam? What does the steam [...]
