1) The measuring unit of weight is a) Newton  b) Kg c) g 2) The force that two surfaces exert on each other  a) pull b) push c) Friction 3) The pull of gravity of the objects is called  a) pull b) push c) Weight 4) The mixture that is formed when a solid is dissolved in a liquid a) Solution b) mixture c) matter 5) All of these are observations of the chemical reaction except a) change in color b) light c) melting 6) Which of these can be helpful to separate iron from sand a) sieving b) using magnets c) filtration 7) The measuring unit of density is a) g/cm b) g c) g/cm3 8) spring scale is used to measure  a) Weight b) length c) mass 9) One of the following isn't a chemical change a) cutting fruit b) burning wood c) cooking 10) One of the following is a useful chemical change  a) tooth decay b) cooking c) iron rusting 11) What is the evidence of reaction on the following chemical change  a) gas b) color c) gas and light 12) All of the following are evidences of a chemical reaction except  a) bubbles b) light c) gas d) shape 13) which of the following is an evidence of the following chemical change a) change in color b) bubbles c) gas 14) Which reaction gives bubbles a) baking soda with vinegar b) baking c) burning

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