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Scientists study the world and learn about things using a process called scientific method. By asking important questions and searching for the answers, they are likely to make amazing discoveries. Sometimes, a scientist is unable to answer his or her own questions, but if he or she has taken good notes, another scientist who comes along later may be able to use new knowledge to answer them.

When you use this scientific method to conduct an experiment, you start by observing(观察) something that interests you. Based on your observations, you make a hypothesis. This is using what you know to make a smart guess about what you think could happen or what may be happening. Then, you are ready to begin your experiment. Throughout your experiment, you take down notes, which are called experimental data. You should be constantly making observations during this process. You may make discoveries that cause you to improve your experiment as you go. Finally, you conclude your experiment and begin to look over your notes to decide what it all means. Based on what you have learned, you make a final statement about whether your hypothesis was correct or not. You have to have reasons and evidence to support what you are saying.

Learning to use the scientific method can be difficult, but it is rewarding(值得做的). Because all the steps are organized, the results are more reliable. When you provide your observations as evidence to support what you are saying, your ideas are more likely to be accepted.

1．According to the article, how can a scientist discover an amazing thing?

A．By conducting experiments.

B．By reading more books about science.

C．By taking notes in great detail during experiments.

D．By asking important questions and trying to answer them.

2．The underlined word “hypothesis” in paragraph 2 most probably means “________”.

A．结论

B．假设

C．怀疑

D．过程

3．If you want to support your opinion, you will need ________.
① reasons
② scientists who are in favor of you
③ some books about what you are studying
④ your observations during the experiment

A．①②

B．③④

C．①④

D．②③

4．Which of the following statements is true, according to the article?

A．It is worth learning to use the scientific method.

B．Scientists are usually able to answer all of their questions.

C．There is no need to make a hypothesis after an observation.

D．You opinion will be accepted as long as it is presented with evidence.

5．By writing this article, the author mainly wanted to ________.

A．introduce the scientific method to readers

B．teach readers how to conduct an experiment

C．tell readers the importance of observing things

D．encourage readers to become more interested in science