Examine quarries, water cycles and reactive gas for KS2 science We are surrounded by materials. In this programme we look at the properties and uses of materials and find out about reversible change.
Rocky Road looks at the processes involved at a quarry, from the rock being blasted from the ground, crushed, sieved and mixed with hot bitumen to it being used to make roads. Ice Trail looks at the properties of solid and liquid water and the reversible changes, melting and freezing, as a block of ice is shaped and moulded into a sculpture. Melting Moments sees how heat can change ice from a solid, liquid to a gas. Rainy Days takes a close look at the water cycle and the part played by evaporation and condensation, with a combination of live action and animation. All Change takes us into the lab to watch the effects of solid carbon dioxide placed inside a balloon, and what happens to a balloon when placed into liquid nitrogen.

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