combustion reaction

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What is a combustion reaction? Chemistry

By |2018-04-16T23:48:25+00:00June 3rd, 2017|Chemistry|

A candle flame When two molecules bump into each other under the right circumstances, they may exchange electrons in ways that change both molecules into new kinds of molecules. While they're doing that - reacting to each other - they may also release some electrical energy in the form of heat or light. This [...]

Fire and Magnifying Glasses – Chemistry project

By |2018-04-16T23:51:44+00:00June 3rd, 2017|Chemistry|

Using a magnifying glass to focus sunlight and start a fire Be very careful with fire, because it can burn you, or burn down your house. If you're not an adult, make sure an adult knows when you do this experiment and thinks you are safe. Grass, like all living things, is made out [...]

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, [...]

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 [...]