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American science after colonization

By |2018-04-08T11:21:58+00:00September 28th, 2017|Americas, Native American, North America, Science|

European trade goods (thanks to Nebraska Game and Parks Division) North American people made rapid scientific advances in the course of the 1500s AD, inspired by contacts with traders and explorers from Europe. People learned how to tame horses and ride them, and they learned how to use guns. They also began to use a [...]

West Asian environment – Mesopotamia and Iran

By |2018-04-25T23:39:43+00:00September 13th, 2017|Environment, West Asia|

Snow in Afghanistan Afghanistan West Asia is a dry place, where it's always hard to get enough water and there are a lot of fights over water. The easternmost part of West Asia is Afghanistan, which is mountainous and cold in the winter. On the other side of Afghanistan is China, and for the [...]

Dysentery – History of diarrhea

By |2017-09-06T17:52:46+00:00September 6th, 2017|Greeks, Science|

A waterfall in what is now the south-eastern United States Dysentery means having trouble with your insides - your intestines. It usually means that you have very serious diarrhea. In the ancient and medieval world, dysentery killed about a third of all the babies born before they got to be a year old. [...]

Roman aqueducts – Pont du Gard, Segovia, and more

By |2018-05-20T01:26:05+00:00August 25th, 2017|Architecture, Romans, Science|

Aqueduct in the city of Rome - Roman aqueducts brought clean water to the people of Rome Why did the Romans build aqueducts? As Roman towns got bigger under the Roman Republic, it got too hard for the people who lived in the towns to get clean drinking and washing water. Because raw sewage was draining [...]

Stratus clouds – A blanket of cloud – Weather science

By |2017-08-20T18:32:08+00:00August 20th, 2017|Physics|

Stratus clouds (thanks to NASA) If you see stratus clouds, that's the time to get inside and stay there. Stratus clouds mean rain if it is warm and snow if it is cold. They look like a huge gray blanket that hangs low in the sky. Sometimes stratus clouds are on the ground or very near the ground, [...]

Nimbus clouds – Rain clouds – Weather

By |2018-06-11T22:13:06+00:00August 20th, 2017|Physics|

Cumulonimbus clouds are a type of nimbus cloud What is a nimbus cloud? Nimbus clouds often mean that a thunder storm is brewing: there may soon be thunder and lightning. Get out of the swimming pool! (More about thunderstorms) Nimbus is a fancy word, but it really just means a cloud that already has rain or snow falling out of it. [...]

Why is the sky blue? A science project

By |2017-08-20T14:53:06+00:00August 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 [...]

Steam clouds projects – Weather science

By |2018-05-31T11:49:31+00:00August 20th, 2017|Physics|

See the steam coming out of this kettle? You can make your own clouds and see how they work. Just take a tea kettle and fill it full of water and put it on the stove to boil (make sure this is okay with your folks). When the steam comes out, it makes a white cloud - that's the [...]

Cumulus clouds – Weather – Science

By |2018-05-28T23:34:03+00:00August 20th, 2017|History|

These are cumulus clouds. They are puffy. What is a cumulus cloud? Cumulus clouds are clouds that are piled up on top of each other. "Cumulus" means a pile in Latin, as in our word "accumulate" meaning to pile up. They are puffy clouds. (What are clouds made of?) Sometimes cumulus clouds are white and there [...]

What are clouds made of? Weather science

By |2018-06-17T23:06:26+00:00August 20th, 2017|History|

Clouds in the sky. What are clouds? Clouds are made of water What are clouds? Clouds are made of drops of water or ice. When the wind picks up water from the ocean or from the land on Earth, it can carry tiny drops of water up into the sky. These drops are too small for you to see. [...]