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What are hydrocarbons? Simple science – Chemistry

By |2017-06-02T08:24:00+00:00June 2nd, 2017|Chemistry|

A model of a methane molecule Hydrocarbons are molecules made out of hydrogen atoms and carbon atoms. Methane is the simplest hydrocarbon molecule: just one carbon atom with four hydrogen atoms stuck to it. Because both carbon and hydrogen were common in nebulae, hydrocarbon molecules are very common in space. Many of these molecules [...]

Dry Ice – Carbon dioxide chemistry project

By |2018-04-16T17:38:03+00:00June 1st, 2017|Chemistry|

Frozen carbon dioxide (dry ice) Normally you can't see carbon dioxide because it is an invisible gas. But if you get some frozen carbon dioxide (also called dry ice), you can see it as chunks of ice. You can get dry ice from some grocery stores, or ice cream stores. Put it in [...]

Carbon, candles, and cars – Chemistry project

By |2018-04-16T17:38:03+00:00June 1st, 2017|Chemistry|

Candles burn carbon You can see the relationship between carbon, oxygen, and hydrogen easily at home or at school. You'll need a candle. Most candles are either made from paraffin wax or from beeswax. It doesn't matter which you have for this experiment. Light the candle and let it burn for a minute. [...]

What is carbon dioxide? Molecules and Chemistry

By |2017-06-01T13:27:02+00:00June 1st, 2017|Chemistry|

Carbon dioxide is one of the simplest and commonest molecules in the universe. It has only three Atoms - one carbon and two oxygen atoms. It's easy for the carbon atoms to join up with oxygen atoms because the outer shell (the valance shell) of the carbon atom has only four electrons in it, leaving room [...]

What is carbon? Atoms – Chemistry

By |2018-04-08T11:21:48+00:00June 1st, 2017|Biology, Chemistry|

Diagram of a carbon atom When a star has changed all of the hydrogen atoms into helium, it begins to convert the helium atoms into carbon atoms and oxygen atoms. All of the carbon in the universe was made inside stars. Carbon atoms are heavier than helium or hydrogen, because they have six [...]

Eggs – Evolution and Biology

By |2018-04-16T10:33:22+00:00May 29th, 2017|Biology|

Fish eggs The earliest living creatures made babies by dividing themselves in half, so that one cell became two cells. But about 1.4 billion years ago, some creatures with more than one cell began to develop specialized cells that could combine with the cells from another creature to make a new creature. These were [...]