Do it yourself! From the hills, river-beds or the land in your vicinity, collect rock specimens of different types, shapes, colours, etc. Observe the rock specimens and note down the following. Place where the rock was found. • Colour of the rock. Spots on the rock and their colour. • Weight of the rock (estimated; heavy / light). • Hardness of the rock (hard / brittle / medium). • Structure of the rock (Uniform grains/ layers / hollowness) • Porosity of the rock (porous / non-porous).
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and note down the following. Place where the rock was found. • Colour of the rock. Spots on the rock and their colour. • Weight of the rock (estimated; heavy / light). • Hardness of the rock (hard / brittle / medium). • Structure of the rock (Uniform grains/ layers / hollowness) • Porosity of the rock (porous / non-porous).
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