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What’s the atmosphere? Weather science

By |2018-09-23T20:18:36+00:00August 19th, 2017|Physics|

Earth's atmosphere: Did the Earth look like this right after it cooled down? What is the atmosphere? The atmosphere is the air that is wrapped all around a planet. Read more about planets Do all planets have atmospheres? Not all planets have atmospheres. In order to have an atmosphere, the planet has to have [...]

What is rust? Oxidation reactions and chemistry

By |2018-09-25T20:07:38+00:00June 3rd, 2017|History|

What is rust? A rusty fence railing Oxidation reactions Fire isn't the only kind of combustion reaction. Some kinds of metal, if you leave them in contact with oxygen, will also react with the oxygen, but much more slowly, and without making a flame. Combustion reactions Lots of chemistry articles Because this reaction [...]

What is oxygen? Atoms, elements, chemistry

By |2018-04-24T14:46:22+00:00June 2nd, 2017|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 carbon atoms and oxygen atoms. All of the oxygen in the universe starts out inside stars. Then when all the helium is used up, [...]

What is iron? Atoms, elements, chemistry

By |2018-04-24T14:46:24+00:00June 2nd, 2017|Chemistry|

Diagram of an iron atom When a red giant star finishes changing all of its helium into carbon and oxygen, it then starts to turn the carbon and oxygen atoms into iron atoms. Iron is the heaviest kind of atom that a star can make, so when a star has made most of its carbon and oxygen [...]

Tin cans – Chemistry projects – Science

By |2017-06-01T23:19:19+00:00June 1st, 2017|Chemistry|

Steel soup can To see how tin keeps a steel can from rusting, get an empty can. A can from canned green beans or canned peaches or something like that would be good. Wash the can and use a can-opener to take off the sharp top so you don't cut yourself, and recycle the [...]

Rust and iron – Chemistry project

By |2017-06-01T22:24:46+00:00June 1st, 2017|Chemistry|

A rusty sign You can easily see that iron rusts and turns red when oxygen touches it. Go look around your backyard or your neighborhood and try to find ten things that are made of iron and have rusted. You might check cars, fences, old toys or tools left in the yard, nails, and [...]