Unit 1 Textbook ReviewName: ______
1) Summarize the different parts of the scientific method.
2) Describe the difference between a scientific theory and a natural law.
3) Describe the “Uncertainty” in measurements. Understand how to estimate digits in a measurement.

Sample Exercise 1.1 (Try it on your own before looking at the answer in the book.)
What is the difference between the measurements 25.00 mL and 25 mL?
4) Draw an illustration that shows the difference in accuracy and precision. (Something other than the darts in the textbook. Be creative!)
Sample Exercise 1.3Give the number of significant figures for each of the following results.
(Try it on your own before looking at the answer in the book.)
A) A student’s extraction procedure of tea yields 0.0105 g of caffeine
B) A chemist records a mass of 0.050080 g in an analysis.
C) In an experiment a span of time is determined to be 8.050 x 10-3 s.

5) Describe the two rules for Significant Digits in Mathematical Operations. (x and ÷ vs + and -)
Sample Exercise 1.4Carry out the following mathematical operations, and give each result with the correct number of significant digits. (Try it on your own before looking at the answer in the book.)
A) 1.05 x 10-3÷6.135 =
B) 21 – 13.8

Sample Exercise 1.5 (Try it on your own before looking at the answer in the book.Show your work below)
A Pencil is 7.00 in long. What is the length in centimeters?

Sample Exercise 1.7 (Try it on your own before looking at the answer in the book.Show your work below)
A student has entered a 10.0 km run. How long is the run in miles?

Sample Exercise 1.8(Try it on your own before looking at the answer in the book.Show your work below)
The speed limit on many highways in the United States 55 mi/hr. What number would be posted in kilometers per hour?
6) What are the three systems for measuring temperature? How do you convert between Celsius and Kelvin?
7) What is the equation for determining Density?
Sample Exercise 1.8 (Try it on your own before looking at the answer in the book.Show your work below)
A chemist is trying to identify the main component of a compact disk cleaning fluid, finds that 25.00 cm3 (or ml) of the substance has a mass of 19.625 g at 20 oC. Identify the substance using the table in the textbook. Use correct sig figs!

8) How is Matter described, and what are the different classifications of matter?
9) What are the different types of mixtures, and describe their differences.
10) Describe the process of distillation. When would the process of distillation be used?
11) Describe the process of filtration. When would the process of filtration be used?
12) Describe the process of chromatography. When would the process of chromatography be used?