The Sun is green, actually. We'll go into why the blackbody effect means the Sun emits more green visible light than any other color, and why evolution and color perception mean it's ok to see it as yellow, anyway.

Our universe is prone to increasing disorder and chaos. So how did it generate the extreme complexity we see in life? Actually, the laws of physics themselves may demand it.

If you stick water in the freezer, it will take a few hours to freeze into ice. How is it, then, that cold packs go from room temperature to near freezing in mere seconds? John Pollard details the chemistry of the cold pack, shedding...

Pupil outcome: I can explain how vibrations are passed to and through the air, to allow sounds to be heard. Key learning points: - A vibrating object causes nearby air particles to vibrate too. - Air particles are knocked forwards but...

The state of matter in which particles are widely separated and are in constant random motion.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise...

The spread of particles from an area of high concentration to an area of low concentration.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual...

This video covers:

- What particle theory is (also known as kinetic th
eory)
- How substances change from one state to another e.g. from solid
to liquid
- The idea that density doesn't change when substances...

This video explains 'particle theory' and uses it to describe the 3 states of matter: solid, liquid and gas. It also covers how substances move between these states at the particle level. This video is suitable for: - All exam boards -...