Chapter 2 — for good measure: scientific notation and the metric system

1. Scientific notation is a way of expressing _________.

A. extremely small numbers

B. extremely large numbers

C. numbers that have many zeros

D. all of the above

D. all of the above

2. For the number 4.5 × 10^6, which represents the base?

A. 4.5

B. 10

C. 6

D. 4.5 × 10

B. 10

3. For the number 6.8 × 10^7, the 7 is called the _________.

A. exponent

B. coefficient

C. multiplier

D. product

A. exponent

4. When multiplying numbers written in scientific notation, you should______ the exponents.

A. multiply

B. divide

C. add

D. subtract 

c. add

5. When adding and subtracting numbers written in scientific notation, all the numbers should be converted to the same_____value

A. exponent

B. base

C. coefficient

D. weighted

A. exponent

6. The metric prefix "kilo means______.

A. ten

B. hundred

C. thousand

D. million

C. thousand

7. Which of the following metric units is used to express luminous intensity?

A. Meter.

B. Candela.

C. Kelvin.

D. Mole.

B. Candela.

8. The cubic centimeter is a unit used to express______.

A. mass

B. length

C. volume

D. temperature

C. volume

9. What is the symbol for centimeter?

A. cm

B. mc

C. km

D. ml

A. cm

10. Which country commonly uses the English system rather than the metric system?

A. Canada.

B. United States.

C. France.

D. England.

B. United States.

11. The earth is 93 million miles from the sun. What is this number in scientific notation?

A. 0.93 × 10^8

B. 9.3 × 10^7

C. 93 × 10^6

D. 930 × 10^5

B. 9.3 × 10^7

12. What is the number 4.85 × 10^5 in standard notation?

A. 485

B. 4,850

C. 48.500

D. 485,000

D. 485,000

13. How many millimeters are in 1 centimeter?

A. 10

B. 100

C. 1.000

D. 10,000

A. 10

14. Converting between metric units is easier than converting between English units because you only need to _______.

A. add

B. move the decimal point

C. subtract

D. use scientific notation

B. move the decimal point

15. When reading a graduated cylinder, you should read the meniscus, which is the______of the curve.

A. bottom

B. top

C. side

D. middle

A. bottom

16. Which of the following instruments is used in the laboratory to distribute and extract precise amounts of liquid?

A. Vacuum pump.

B. Syringe with needle.

C. Syphon.

D. Pipette.

D. Pipette.

17. In the metric system, the basic unit of linear measurement is the____

A. kilometer

B. mile

C. meter

D. milliliter

C. meter

18. Which of the following is the most accurate for measuring volumes?

A. Beaker.

C. Graduated cylinder.

B. Flask.

D. Test tube.

C. Graduated cylinder.

19. Which of the following units is commonly used to measure microscopic objects?

A. Centimeter. 

B. Millimeter.

C. Kilometer.

D. Nanometer.

D. Nanometer.

20. Water freezes at 32 degrees Fahrenheit. Convert this value to degrees Celsius.

A. 0

B. 57.6

C. 77

D. 89.6

A. 0

21. What is the basic unit of volume in the metric system?

A. Microliter.

B. Nanometer.

C. Liter.

D. Cubic centimeter.

C. Liter.

22. To convert 1.0 micrometers to millimeters, you would move the decimal point______

A. three spaces to the right

C. two spaces to the right

B. three spaces to the left

D. two spaces to the left

B. three spaces to the left

23. Before adding numbers written in scientific notation, you may need to ___so that all the numbers have the same exponent value.

A. change the base

B. change the coefficient

C. move the decimal point of the coefficient

D. all of these

C. move the decimal point of the coefficient

24. Add the following numbers: 6.5 × 10^8 + 4.2 × 10^7.

A. 9.7 × 10^1

B. 6.542 × 10^7

C. 6.92 × 10^8

D. 10.7 × 10^8

C. 6.92 × 10^8

25. Subtract the following numbers: 4.0 × 10^6 - 2.5 × 10^6.

A. 1.5 × 10^6

B. 1.5 x 10^12

C. 3.75 × 10^8

D. -1.5 x 10^6

A. 1.5 × 10^6

26. Multiply the following numbers: 8.2 × 10^4 × 2.5 × 10^2.

A. 2.05 × 10^2

B. 2.05 × 10^6

C. 2.05 × 10^7

D. 20.5 x 10^6

C. 2.05 × 10^7

27. Two inches equals______centimeters

A. 16.8

B.12.9

C. 5.08

D. 1.75

C. 5.08

28. Divide the following numbers: 8.0 × 10^6 ÷ 2.0 × 10^3.

A. 4.0 × 10^2

B. 4.0 x 10^3

C. 4.0 × 10^9

D. 40 × 10^8

B. 4.0 x 10^3

29. Yesterday, you ran 3 miles. How many kilometers did you run?

A 1.6

B. 4.8

C. 10.2

D. 16.4

B. 4.8

30. If a person who weighs 160 pounds on earth went to the moon, where the gravitational force is reduced, he/she would_________.

A. weigh the same

B. have the same mass

C. weigh more

D. have less mass

B. have the same mass