1) magnesium oxide a) compound b) mixture c) Element 2) mineral water a) Compound b) Element c) None of this 3) Water a) Compound b) mixture c) Element 4) Steel a) compound b) mixture c) Element 5) bronze a) element b) mixture c) compound 6) Duraluimin a) Element b) mixture c) compound 7) Iron sulphide a) compound b) Mixture c) Element 8) Ammunia a) Element b) mixture c) Compound 9) Air a) Mixture b) compound 10) 3 examples for compound a) Water, carbon dioxide, ammunia b) Milk, mineral, air 11) Define mixture a) Consist of 2 or more element which aren't joined together b) Consist only of 1 element 12) Obtain calk from a suspension of chalk and water  a) Evaporation b) Filtiration 13) Obtain pure water from sea water a) Filtiration b) Evaporation c) Chramotoghraphy d) Distillation 14) identify the colour's pigment in flower a) Crystlistion b) Chramotography 15) Obtain salt from sea water a) Filtiration b) Distillation c) Evaporation 16) The substance left behind in the filter paper is called a) Residue b) Filtirate 17) The pure liquid obtained from distillation is called  a) Crystal b) Distillate 18) What is the simplest kind of matter a) Compound b) Element 19) Who clasfied the periodic table  a) Able magawith b) Mendeleev 20) The % of iron in the composition by mass of the earth crust a) 25% b) 5% 21) Causes adicttion a) Nicotine b) Tar c) Carcinogens 22) Kills cells in the air passage in the lungs a) Irritants b) Nicotine c) Tar d) Carcinogens e) Carbon monoxide 23) For normal vision a) Vaitamin d b) Vaitamin a 24) For clotting of blood a) Vaitamin k b) Vaitamin c 25) A person suffers from rickets a) Vitamin d is needed b) Vitamin c is needed 26) Water makes about ______________ of our body weigth a) 50 % b) 70% 27) What is the correct equation for respiration a) Carbon dioxide + water in the presence of light from sun trapped by chlorophyll =glocuse + oxygen b) glocuse + oxygen - - - - - - - Energy +carbon dioxide + water 28) Define respiration a) Is breaking down glocuse and oxygen in the presence of energy into carbon dioxide and water b) Is the process by which plants make food using carbon dioxide, water and light energy from the sun 29) Is this inhaled air or exhaled air 1 - has more carbon dioxide and water 2- has less oxygen 3- high temperature a) Inhaled air b) Exhaled air 30) The unit used for force is a) Newton b) Pascal c) Joule d) Kilo trouble e) Watt f) Kilojoule 31) An object is said to have_____________ if the gravitational force acts on it a) Volume b) Kent c) Mass d) density e) Weight 32) A _______________ can be used to musure force a) Beam balance b) Spring balsnce 33) Formula of work done a) W =f ×d b) W = d/f

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