CHAPTER 1 Assessment

Reviewing Content

Choose the letter that best answers the question or completes the statement.

1. The application of knowledge to solve practical problems is known as

   1. science.

   2. curiosity.

   3. technology.

   4. experimentation.

2. Which is not a branch of natural science?

   1. physical science

   2. life science

   3. Earth science

   4. social science

3. What is the purpose of an experiment?

   1. to communicate data

   2. to test a hypothesis

   3. to prove a scientific law

   4. none of the above

4. A representation of an object or event is called

   1. a scientific law.

   2. a model.

   3. a hypothesis.

   4. a variable.

5. Which value is equivalent to $5 \times 106$?

   1. five thousand

   2. fifty thousand

   3. five million

   4. fifty million

6. What is the SI base unit of mass?

   1. gram

   2. kilogram

   3. milligram

   4. pound

7. An electric generator produces 10 megawatts. This amount is equivalent to

   1. 10,000 watts.

   2. 1,000,000 watts.

   3. 10,000,000 watts.

   4. 0.010 watt.

8. Which of the following is a ratio of equivalent measurements that is used to convert a quantity expressed in one unit to another unit?

   1. slope

   2. conversion factor

   3. derived unit

   4. density

9. When the ratio of two variables is constant, their relationship can be described as

   1. inversely proportional.

   2. interdependent.

   3. directly proportional.

   4. parallel.

10. Which of the following would best suit data that describe how a part relates to the whole?

    1. line graph

    2. bar graph

    3. circle graph

    4. scientific notation

Understanding Concepts

11. Give an example of a case where the branches of natural science appear to overlap.

12. What is the goal of a scientific method?

13. How are controlled experiments useful?

14. Suppose you perform an experiment, and the resulting data do not support your hypothesis. What is the next step you might take?

15. What are some safety precautions that you should follow when working in the laboratory?

16. What is scientific notation?

17. What are the SI base units for length and temperature?

18. How do derived units differ from base units?

19. How is the precision of a calculated result related to the precision of the measurements used in the calculation?

20. How can you convert a temperature expressed in degrees Celsius to kelvins?

21. Which of the following graphs describes a direct proportion?

    dd

22. Why is it important for scientists to communicatetheir results?

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