In this video Paul Andersen explains the difference between chemical and physical processes. Chemical processes occur when bonds are broken and reformed. Physical processes occur when intermolecular forces are broken and reformed. A...

A chemical change in which chemical bonds are broken, and new bonds are formed, to produce a new chemical substance.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning...

Chemical substances produced in our bodies that act as messengers, communicating between our different cells and organs.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using...

How fun is this chemical traffic light experiment!? Liquid changes colour from green to red and later to yellow. The best part is it is repeatable. Just shake the bottle to start again.



For this experiment you w
ould...

The chairman of the Foreign Affairs Committee in the Russian Federal Assembly's upper house on Saturday said Britain has to reconsider its attitude towards his country in order to normalise relations.

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