1) is metal a conductor a) yes b) no c) sometimes 2) Does plastic come from Nature a) No b) yes c) sometimes 3) Is glass transparent a) no b) sometimes c) yes 4) is wood a insulator a) no b) sometimes c) yes 5) Is freezing a reversible change a) yes b) no c) sometimes 6) is Plastic waterproof a) yes b) no c) sometimes 7) What is sieving a) A mixture made from solid particles b) Separating a mixture of sand and water

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