Significant Figures Practice Worksheet

Physical Science

Activity # 2 Name:________________

Date:___________________

Significant Figures Practice Worksheet

How many significant figures do the following numbers have? 1) 1234 _____ 2) 0.023 _____ 3) 890 _____ 4) 91010 _____ 5) 9010.0 _____ 6) 1090.0010 _____ 7) 0.00120 _____ 8) 3.4 x 104 _____ 9) 9.0 x 10-3 _____ 10) 9.010 x 10-2 _____ 11) 0.00030 _____ 12) 1020010 _____ 13) 780. _____ 14) 1000 _____ 15) 918.010 _____

Solutions to the Significant Figures Practice Worksheet

1) 4 2) 2 3) 2 4) 4 5) 5 6) 8 7) 3 8) 2 9) 2 10) 4 11) 2 12) 6 13) 3 14) 1 15) 6

Physical Science

Activity # 3 SI Units Name

Period

Date

PART A

What type of measurement is indicated by each of the following units? Choices are in the last column.

1. g/mL 2. s

4. g 5. cm3

7. mg 8. L

density length mass

3. km

6. mm

9. g/cm3

time volume

PART B

For each of the following commonly used measurements, indicate its symbol. Use the symbols to complete the following sentences with the most appropriate unit. Units may be used more than once or not at all.

_____ milliliter

_____ milligram

_____ kilometer

_____ centimeter

_____ kilogram

_____ millimeter

_____ second

_____ gram

_____ meter

_____ liter

1. Colas may be purchased in two or three _____ bottles.

2. The mass of a bowling ball is 7.25 _____.

3. The length of the common housefly is about 1 _____.

4. The mass of a paperclip is about 1 _____.

5. One teaspoon of cough syrup has a volume of 5 _____.

6. Stand with your arms raised out to your side. The distance from your nose to your outstretched fingers is about 1 _____.

7. On a statistical basis, smoking a single cigarette lowers your life expectancy by 642,000 _____, or 10.7 minutes.

PART C

Convert the following metric measurements:

1000 mg = _____ g

198g = _____ Kg

8 mm = _____ cm

160 cm = _____ mm 75 mL = _____ L

6.3 cm = _____ mm

109 g = _____ Kg

50 cm = _____ m

5.6 m = _____ cm

250 m = _____ Km

5 L = _____mL

26,000 cm = _____ m

14 Km = _____ m

16 cm = _____mm

56,500 mm = _____ Km

1 L = _____ mL

65 g = _____ mg

27.5 mg = _____ g

480 cm = _____ m

2500 m = _____ Km 923 cm = _____ m

27 g = _____ kg

355 mL = _____ L

0.025 Km = _____ cm

Name ANSWER KEY

Period

Date

SI Units

PART A

What type of measurement is indicated by each of the following units? Choices are in the last column.

10. g/mL density

11. s

time

13. g

mass

14. cm3 volume

16. mg 17. L

mass volume

density length mass

12. km length

15. mm length

18. g/cm3 density

time volume

PART B

For each of the following commonly used measurements, indicate its symbol. Use the symbols to complete the following sentences with the most appropriate unit. Units may be used more than once or not at all.

mL milliliter

mg milligram

km kilometer

cm centimeter

kg kilogram

mm millimeter

s second

g gram

m meter

L liter

8. Colas may be purchased in two or three liter bottles.

9. The mass of a bowling ball is 7.25 kg.

10.

The length of the common housefly is about 1 cm.

11.

The mass of a paperclip is about 1 mg.

12.

One teaspoon of cough syrup has a volume of 5 mL.

13.

Stand with your arms raised out to your side. The distance from your nose to your

outstretched fingers is about 1 m.

14.

On a statistical basis, smoking a single cigarette lowers your life expectancy by 642,000 s,

or 10.7 minutes.

PART C

Convert the following metric measurements:

1000 mg = 1 g

198g = 0.198 Kg

8 mm = 0.8 cm

160 cm = 1,600 mm

75mL = 0.075 L

6.3 cm = 63 mm

109 g = 0.109 Kg

50 cm = 0.50 m

5.6 m = 560 cm

250 m = 0.250 Km

5 L = 5,000mL

26,000 cm = 260 m

14 Km = 14,000 m

16 cm = 160mm

56,500 mm = 0.0565 Km

1 L = 1,000 mL

65 g = 65,000 mg

27.5 mg = 0.0275 g

480 cm = 4.8 m

2500 m = 2.5 Km

923 cm = 9.23 m

27 g = 0.027 kg

355 mL = 0.355 L

0.025 Km = 2,500 cm

Grading Scale (50 Q's: ? point each. TOTAL = 25)

A 25 -23

B 22 - 20

C 19 - 17

D 16 - 14

F < 13

Physical Science

Homework # 3 Name:________________

Date:___________________

Significant Figure Calculations

Solve the following mathematical problems such that the answers have the correct number of significant figures:

1) 334.54 grams + 198 grams = ___________________

2) 34.1 grams / 1.1 mL = ___________________

3) 2.11 x 103 joules / 34 seconds = ___________________

4) 0.0010 meters ? 0.11 m = ___________________

5) 349 cm + 1.10 cm + 100 cm = ___________________

6) 450 meters / 114 seconds = ___________________

7) 298.01 kilograms + 34.112 kilograms = ___________________

8) 84 m/s x 31.221 s = ___________________

Significant Figure Calculations ? Answers

Solve the following mathematical problems such that the answers have the correct number of significant figures: 1) 334.54 grams + 198 grams = 533 grams (rounded from 532.42 grams)

2) 34.1 grams / 1.1 mL = 31 g/mL (not rounded) 3) 2.11 x 103 joules / 34 seconds = 62 J/s (rounded from 62.0588 J/s)

4) 0.0010 meters ? 0.11 m = -0.11 m (rounded from -0.109 m)

5) 349 cm + 1.10 cm + 100 cm = 500 cm (rounded from 450.1 cm)

6) 450 meters / 114 seconds = 3.9 m/s (rounded from 3.9474 m/s)

7) 298.01 kilograms + 34.112 kilograms = 332.12 kg (rounded from 332.122 kg)

8) 84 m/s x 31.221 s = 2600 m (rounded from 2622.564 m)

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