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Moving Image

Pepper scatter experiment

Watch what happens in this pepper scatter experiment by Surfing Scientist, Ruben Meerman. Ruben demonstrates an important property of water, surface tension, by dipping a toothpick into water sprinkled with pepper. Find out what happens when detergent is added.

Image

Water striders on a pond surface

This is a colour photograph of water striders ('Aquarius' sp) on the surface of a pond. (Classification - Phylum: Arthropoda, Class: Hexapoda, Order: Hemiptera, Family: Gerridae.)

Image

Water molecule

This is a colour image of a model of a molecule of water, H₂O. In this model, atoms are represented by coloured spheres held together by grey rods, representing covalent bonds. The water molecule contains one oxygen atom (the red sphere) and two hydrogen atoms (the grey-white spheres).

Moving Image

The surface tension of water

Imagine you could walk on water! Some insects can do just that. Watch as the Surfing Scientist uses a paperclip and a glass of water to demonstrate how this is possible.