Outcomes

Specification References

5.2 recall and use the relationship between density, mass and volume: density = mass/ volume
5.3 describe how to determine density using direct measurements of mass and volume

Density of Regular shapes - blocks and maybe a cylinder to challenge the more able. They can use the digital micrometer for one and a more sensitive balance. This will revise significant figures in measurements and in calculations.
They can use their values to identify the material.
You could also recap on prefixes - milli, centi, kilo along with conversions (1 ml = 1 cm3,m3 <--> cm3, g <--> kg)
Density of Irregular shapes using Eureka Can and Displacement Method.
Density of Water using a measuring cylinder. It is important for pupils to know the density of water is 1g/cm3 or 1000kg/m3.

Electrical Force - balloons for electrostatics, rice in a plastic bottle charging polythene rods and using watch glass show repulsion

A tank with water in it will be heavy and so is only to be moved by the technician; please refer to the Manual handling section of the Laboratory Lessons Health and Safety Risk Assessment
When using springs goggles must be worn
The main risk is from the vacuum pump and apparatus. The specific risk assessment must be read before using the apparatus.
General Laboratory Health and Safety Risk Assessment