GuidedPractice: Sig Figs, Scientific Notation Unit Conversions

Guided Practice: Sig Figs, Scientific Notation & Unit Conversions

Directions: Use your knowledge about significant figures, scientific notation, and unit conversion bridges to answer the following questions:

Part One: Sig Figs

How many significant figures are there in each number?

1. 0.0871

4. 3.803

2. 7,010

5. 9,570.0

3. 0.00084

Perform the following calculations and write the answer using the correct number of sig figs.

6. 709.0 + 1.01 =

9. 630.0602 ? 600.00 =

7. 15.0 / 3 =

10. 1,000.0 / 500 =

8. 50.0 x 5.0 =

Part Two: Scientific Notation

Convert each of the real numbers to scientific notation:

1. 709

4. 0.0241

2. 0.424

5. 69,000

3. 8,010

Convert each of the numbers from scientific notation to real:

6. 5.33 x 10-3

9. 4.15 x 100

7. 3.85 x 10-2

10. 6.02 x 1023

8. 8.34 x 104

Part Three: Unit Conversions

Using bridges, convert the following measurements to the new units indicated. Show your

bridge work and write your answer using the correct number of sig figs!

1. 172.72 cm = ? in

2. 5.0 km = ? miles

3. 1500 min = ? hours 4. 5.69 g = ? mg 5. 4.9 tsp = ? mL 6. 2,458.0 oz. = ? lbs 7. 14,998 mL = ? L 8. How many mL are in 2.5 cups of hot

chocolate? 9. How many centimeters are in 81

inches? 10. How many centimeters are in a 100

yd. football field? (Hint: You'll have to do 3 bridges)

Conversion Factors 1.0 cup = 240mL 1.0 tsp = 5.0 mL 1.0 lbs = 16 oz 60.0 min = 1.0 hours 1.00 in = 2.54 cm 1,000.0 mg = 1.00 g 3.0 ft = 1.0 yd 12.0 in = 1.0 ft. 1.0 miles = 1.61 km 1.0 L = 1,000. mL

CLASS Set!- Do NOT take. Available online.

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