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영어로  배우는  초등학교  과학 -  초등 6 학년 :  용액의  성질   /   Properties of the Solutions               다음  문제를  풀어보세요  ~~~     =========================================================================================================================     2.  What is the wrong way of classifying solutions?   A.  amount of the solution B.  smell of the solution C.  color of the solution D.  transparency of the solution E.  uses of the solution           3. What is the wrong way of observing solutions?   A.  not mix the solution with another solution B.  not smell the solution directly C.  taste the solution when it is not known D.  observe the color of the solution on a white paper E.  not touch the solution when is is not known       4.  Choose two solutions that changes the blue litmus paper to red.            [   vinegar , dilute ammonia , soapy water , hydrochloric acid  ]         ANSWER :  [                 ,                 ]           5.  What is the solution that changes red litmus paper to blue color.     A.   vinegar B.   salt water C.   cider D.   soapy water E.   dilute hydrochloric acid             6.  Write the name of the solution that has following properties.             Answer   :  [                          ]   * It has sour taste. * It changes blue litmus paper to red color. * Its color does not change when phenolphthalein is mixed.           7.  Choose two solutions that its color does not change when phenolphthalein is dropped on it.                                   [      ]   A.  soapy water B.  cider C.  hydrochloric acid D.  dilute ammonia  E.  sodium hydroxide           8. What is the correct explanation about alkaline solution?              [      ]         A.  A blue litmus paper becomes red.  B.  Phenolphthalein becomes blue.   C.  Phenolphthalein does not change. D.  A red litmus paper does not change. E.  A red litmus paper becomes blue.                 정답 :    2.   A    3.   C 4.   vinegar ,  hydrochloric acid   5.   D 6.   acid solution 7.   B , C 8.   E