Product Description
Video and lesson investigations on the topics of surface tension and forces. Key concepts include:
- Water behaves as though it has a surface ‘skin’.
- Washing up liquid is one substance which breaks up the surface ‘skin’.
- Floating objects can indicate changes taking place in the surface of water. Forces in the surface usually cancel out.
- Some chemicals can reduce the surface tension in part of the surface.
- The imbalance in forces causes movement.
- The behaviour of other objects can sometimes be used as indicators of invisible processes taking place.
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