Hard rocks, Are difficult to scratch, If hard rocks are polised, They are smooth and shiny, Soft rocks, Scratch and crumble easily, Chalk, A soft rock, Granite, A hard rock, Permeable, Lets water soak through, Impermeable, Doesn't let water soak through, Slate, Is used on house roofs, Fossils, Remains of animals found in rocks, Pebbles, Small pieces of round rock

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