Significant Figures and Measurements

Significant Figures and Reading Measurements

Why do we need to know Significant Figures?

• In math and science we often talk about significant figures, or significant digits. Significant figures are the digits of a number which actually are relevant in indicating how precise a number is.

RULES

• All non zero digits are significant

• All zeros between non zeros are significant

• Trailing zeros are only significant if there is a decimal point

• Leading zeros are never significant

Rules

• Leading zeros-- NOT SIGNIFICANT

• In between Zeros-- SIGNIFICANT

• Nonzero Digits- SIGNIFICANT

• TRAILING ZEROS after decimal- SIGNIFICANT

Multiple Choice

How many significant figures: 0.010 L

• 1
• 2
• 3
• 4

Multiple Choice

How many significant figures: 0.001 g

• 4
• 3
• 2
• 1

Multiple Choice

How many significant figures: 1000 mL

• 1
• 2
• 3
• 4

Multiple Choice

How many significant figures: 0.010 L

• 1

• 2

• 3

• 4

Multiple Choice

How many significant figures: 1000 mL

• 1

• 2

• 3

• 4

Multiple Choice

How many significant figures: 0.001 g

• 4

• 3

• 2

• 1

Multiple Choice

How many significant figures does the following number have? 501

• 1

• 2

• 3

• 4

Multiple Choice

How many significant figures does the following number have? 0.02

• 1

• 2

• 2

• 4

Multiple Choice

How many significant figures does the following number have: 1740200

• 2
• 1
• 3
• 5

Multiple Choice

How many significant figures does the following number have: 2001800.

• 1
• 4
• 6
• 7

Multiple Choice

How many sig figs are there?
27000000

• 2
• 5
• 8

Multiple Choice

Measure to the nearest milliliter.

• 73 mL
• 74 mL

• 76 mL
• 76.1 mL

Multiple Choice

What is the reading of the meniscus?

• 36mL
• 45mL
• 35.0mL
• 30.5mL

Multiple Choice

What is the length of the line?

• 2.0 cm
• 2.3 cm
• 2.1 cm
• 3.0 cm

Multiple Choice

What type of measurement is used with this instrument?

• volume
• length
• mass
• weight

Multiple Choice

What is the correct value?

• 5 ml
• 15 ml
• 20 ml
• 25 ml

Multiple Choice

What is the volume of the water in this graduated cylinder?

• 53 mL
• 54 mL
• 66 mL
• 56 mL

Multiple Choice

What is the volume of the water in this graduated cylinder?

• 7.6 mL
• 7.2 mL
• 6.6 mL
• 6.8 mL

Multiple Choice

Which of the following is the correct measurement of the red line?

• 1/4 inch

• 4 inches

• 3 1/4 inches

• 3/4 inch

Multiple Choice

_{How many inches is the blue crayon?}

• 3 inches

• 2 inches

• 4 inches

• 5 inches

Multiple Choice

• 7 inches
• 5 inches
• 3 inches
• 2 inches