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1) Why the wires are covered by plastic? a) Because the plastic is a poor conductor of electricity  b) Because the plastic is a good conductor of electricity c) Because the plastic is waterproof 2) How do the scientists study the properties of materials? a) Through Touch  b) Through experiments and observation. c) Through Smell 3) One of these is the properties of glass: a) Unbreakable b) Can't see through  c) Can be recycled 4) Scientist can group the materials with similar properties into two groups: a) Hard and soft  b) Breakable and unbreakable c) Flexible and rigid 5) The meaning of Stable is: a) Strong b) Hard c) fixed and steady. 6) All building need to be : a) Strong and stable b) Hard and soft c) Flexible and rigid 7) Why the cooking pans are made from metal ? a) Because the metal is a poor conductor of heat  b) Beacause the metal is a good conductor of a heat c) Because the metal can protect us from heat 8) Very tall building are called: a) Towers b) Long building c) skyscrapers 9) The two ways to test the hardness of a substance are : a) Science test b) Exams. c) Rub and dent test. 10) What do the scientist use to examine the properties of objects? a) They are using their sense b) They are using their books. c) They are using their pens. 11) Flexibility means: a) Rigid b) Able to stretch or bend easily . c) Hard 12) Why the books are made from paper? a) Because the paper is flexible so we can turn the page easily . b) Because the paper is rigid. c) Because the paper is waterproof. 13) What important properties does an inflatable life jacket need to have? a) Rigid. b) Absorbent . c) Water proof, flexible and float over the water. 14) One of these is the properties of metal: a) Good conductor of electricity and heat . b) Flexible. c) Soft. 15) The building with a wider base are more stable than tall thin buildings. a) True b) False

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