In Science, a theory is a reasonable explanation of observed events that are related. A theory often involves an imaginary model that helps scientists picture the way an observed event could be produced. A good example of this is found in the kinetic molecular theory, in which gases are pictured as being made up of many small particles that are in constant motion.

   After a theory has been publicized, scientists design experiments to test the theory. If observations confirm the scientists’ predictions, the theory is supported. If observations do not confirm the predictions, the scientists must search further. There may be a fault in the experiment, or the theory may have to be revised or rejected.

   Science involves imagination and creative thinking as well as collecting information and performing experiments. Facts by themselves arc not science. As the mathematician Jules Henri Poincare said: "Science is built with facts just as a house is built with bricks, but a collection of facts cannot be called science any more than a pile of bricks can be called a house."

   Most scientists start an investigation by finding out what other scientists have learned about a particular problem. After known facts have been gathered, the scientist comes to the part of the investigation that requires considerable imagination. Possible solutions to the problem are formulated. These possible solutions are called hypotheses. In a way, any hypothesis is a leap into the unknown. It extends the scientist's thinking beyond the known facts. The scientist plans experiments, performs calculations, and makes observations to test hypotheses. For without hypotheses, further investigation lacks purpose and direction. When hypotheses are confirmed, they are incorporated into theories.

Which of the following statements is supported by the passage?

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• What do the Hindu people think about marriage?

• What happened when he saw the jumbo jet for the first time?

• The three phases of memory discussed in the pasage are differentiated according to .....

ZUNIA12

• What is NOT true about the Beatles?

• The word "excruciating" in the last paragraph means ________.

• Which of the following is NOT true?

• The author mentions the “ shoesbox under the bed” in order to ................

• The paragraph preceding this passage most probably discusses _________ .

• All of the following are true about robots EXCEPT that ............

• What does the author probably mean by using the expression “children interrupt their education to go to school” (lines 2-3) ?

• The purpose of copyright law is most comparable with the purpose of which of the following?

• Learning to write is .................

• According to the passage, Moby Dick is__________.

• The writer's father retired early because ..................

• The title for this passage could be .............

• According to the passage 3, Pilobolus fungus___________

• How did Juliette Davidson benefit from the experience of her first job?

• People thought Merlin was a dreamer because he__________.

• This article is about ________.

• Which of the following statements does paragraph 1 support?