Introduction to Chemistry

Dr. Walt Volland

Formative pretest true false questions for Lesson 2 Measurements in Chemistry

These questions are a quick overview of the topics in this lesson. You are not expected to know this material before hand. The questions are intended to help you focus on material in the lesson. After you have studied the lesson you should be able to answer these and even more complicated questions.

1. True False Every measurement has a unit tied to it.

2. True False Physical quantities are properties that can be measured..

3. True False The prefix milli- in the metric system means 1/100 .

4. True False The Celsius degree is larger than the Kelvin degree.

5. True False The melting point for water is 0oC or 273 Kelvin.

6. True False The prefix micro- in the metric system equals 1/1,000

7. True False The mass of an object changes when it is moved.

8. True False A kilogram is smaller than a pound.

9. True False A length unit in the metric system is the liter.

10. True False The number 54.07 grams has two significant figures.

11. True False The number 41.526 +/- 0.0001 has five significant figures.

12. True False Exact numbers have an infinite number of significant figures..

13. True False Rounding off 34.79 meters to one decimal place gives 34.8 m.

14. True False Multiplying 1.3 x 103 by 3.0 x 104 gives 3.9 x 107.

15. True False There are 60 seconds in a minute, so in 4 minutes there are 2400 seconds.

16. True False The relation oF = (1.8oF / 1oC) x C + 32 means 50oC equals 122 oF

17. True False A calorie will raise the temperature of one g of water by 1 oC.

18. True False Metals have large specific heats, that is why they conduct heat well.

19. True False Density is a property that depends on the size of an object.

20. True False Specific gravity has no units because it is the ratio of the density of a substance to the density of water at the same temperature.