1) Who is the philosopher said that matter is not composed of particles? a) Aristotole b) Democritus c) Johannes Kepler d) Nikolos Copernicus 2) What is the conlusion of this activity? a) Discontinous nature of solid b) Discontionous nature of gas c) Discontinous nature of liquid d) None of above 3) Select the answer containing only elements a) sulphur,iron,Glucose b) Zinc,Copper,Mercury c) Oxygen,Nitrogen,Water d) Sadium hydroxide,Calcium Carbonate,Hydrogen 4) What is the substance with highest density from given below substances? a) Gold b) Water c) Aluminium d) Iron 5) Select a feature of non metals a) Lustorus b) Ductility c) Poor conductors of heat d) Good conductors of electricity 6) Select a non metal substance a) copper b) mercury c) oxygen d) Zink 7) What is meant by boiling point? a) Contant temperature at solid change in to liquid b) constant temperature at liquid change in to gas c) Coversion of solid in to gas d) none of above 8) pure substances can be divide in to 2 main categories.Select the correct answer a) Elements,compounds b) Pure substances,non pure substances c) Matter,energy d) Solid,liquid

Grade 8

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