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.
A useful theory, in addition to explaining past observations, helps to predict events that have not as yet been
observed. 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 are 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.
Question 36: In the fourth paragraph, the author implies that imagination is most important to scientists when they
________
A. gather known facts. B. formulate possible solutions to a problem.
C. evaluate previous work on a problem. D. close an investigation.
Question 37: The word "this" in line 3 refers to ______.
A. the kinetic molecular theory B. an observed event
C. an imaginary model D. a good example
Question 38: According to the second paragraph, a useful theory is one that helps scientists to ______
A. find errors in past experiments. B. publicize new findings.
C. observe events. D. make predictions.
Question 39: The word "related" in line 1 is closest in meaning to _______.
A. completed B. identified C. described D. connected
Question 40: The word "supported" is closest in meaning to _______.
A. upheld B. investigated C. finished D. adjusted
Question 41: In the last paragraph, what does the author imply a major function of hypotheses?
A. Communicating a scientist's thoughts to others. B. Sifting through known facts.
C. Linking together different theories. D. Providing direction for scientific research.
Question 42: Which of the following statements is supported by the passage?
A. A good scientist needs to be creative.
B. It is better to revise a hypothesis than to reject it.
C. Theories are simply imaginary models of past events.
D. A scientist's most difficult task is testing hypotheses

Question

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.
A useful theory, in addition to explaining past observations, helps to predict events that have not as yet been 
observed. After a theory has been publicized, scientists design experiments to test the theory. If observations confirm the 
scientists&#x27; 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 are 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&#x27;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.
Question 36: In the fourth paragraph, the author implies that imagination is most important to scientists when they 
________
A. gather known facts. B. formulate possible solutions to a problem.
C. evaluate previous work on a problem. D. close an investigation.
Question 37: The word "this" in line 3 refers to ______.
A. the kinetic molecular theory B. an observed event
C. an imaginary model D. a good example
Question 38: According to the second paragraph, a useful theory is one that helps scientists to ______ 
A. find errors in past experiments. B. publicize new findings.
C. observe events. D. make predictions.
Question 39: The word "related" in line 1 is closest in meaning to _______.
A. completed B. identified C. described D. connected 
Question 40: The word "supported" is closest in meaning to _______.
A. upheld B. investigated C. finished D. adjusted 
Question 41: In the last paragraph, what does the author imply a major function of hypotheses? 
A. Communicating a scientist&#x27;s thoughts to others. B. Sifting through known facts. 
C. Linking together different theories. D. Providing direction for scientific research. 
Question 42: Which of the following statements is supported by the passage?
A. A good scientist needs to be creative.
B. It is better to revise a hypothesis than to reject it.
C. Theories are simply imaginary models of past events.
D. A scientist&#x27;s most difficult task is testing hypotheses

Timi · Accepted Answer

Question 36: B. formulate possible solutions to a problem.
Question 37: C. an imaginary model
Question 38: D. make predictions.
Question 39: D. connected
Question 40: A. upheld
Question 41: D. Providing direction for scientific research.
Question 42: A. A good scientist needs to be creative.

Muximuxi · Answer

Timi đúng bạn nè

Duy Hùng · Answer

Question 36: B.

Question 37: A.

Question 39: D.

Question 40: A.

Question 41: D

Question 42: A

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 produce...