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| Ice crystals on car roof. | Close up of ice crystals on car roof. | Icicles almost 1m long. | Frozen milk. Note how the milk has expanded and forced the top off the bottle. |
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| A glass over filled with water. Note the apparent 'skin' on the surface of the water. |
A needle floating on the surface of water. | A drop of water on greased paper. The forces between the water particles are stronger than the forces between the water and greased paper, so the water forms a ball. |
A drop of water on clean glass. The forces between the water particles and the glass are stronger than the forces between the water particles, so the water spreads out. |
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| A droplet of water acting as a magnifying glass. | Oil floating on the surface of water. | Ice floating in water. | Model of a water molecule. Oxygen is red and Hydrogen is white. |
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| Photoelasticity in plastic. The plastic sample was sandwiched between two crossed polaroid sheets. |
Photoelasticity in plastic. The plastic sample was sandwiched between two crossed polaroid sheets. |
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