1) Thermal Insulators... a) Do not allow heat to pass through them b) Allow heat to pass through easily c) Keep heat contained and keep things warm d) Do not keep heat contained and allow things to cool 2) Example of electrical conductors are a) copper b) plastic c) wood d) iron e) rubber 3) Materials that dissolve are a) insoluble b) soluble c) a solution 4) When solid particles mix with the particles of a liquid, this is called ... a) evaporation b) filtering c) dissolving d) sieving 5) A synonym for the word permeable is... a) waterproof b) absorbent c) magnetic d) transparent 6) Ice turning to water is known as a) condensation b) evaporation c) melting 7) Water turns to water vapour... a) condensation b) evaporation c) melting 8) Water vapour turns to water... a) condensation b) evaporation c) melting 9) Most efficient methods of seperation(salt and water) a) filtering b) sieving c) evaporating 10) Most efficient methods of separation(rice and water) a) filtering b) sieving c) evaporating 11) Most efficient methods of separation(sand and water) a) filtering b) sieving c) evaporating 12) Which of these are reversible changes... a) frying an egg b) mixing paper clips and sand c) baking a cake d) mixing coins and flour e) mixing bicarbonate of soda and vinegar

Properties and changes of materials

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