Phases and Classification of Matter, Physical and Chemical Change, Measurements, Dimensional Analysis, Significant Figur

How many significant figures does the following number have: 0.002040

• 6
• 4
• 3
• 2

How many significant figures does the following number have: 100.3

• 4
• 3
• 5
• 2

Round 1047.78 to three sig figs

• 104
• 105
• 1050
• 1050.00

Multiply and round to 3 significant digits.

23 X 12.4

• 28

• 285.20

• 285

• 285.2

How close a measurement is to the accepted value is called..

• Accuracy

• Precision

• Significant

• Estimate

This bullseye demonstrates...

• High Accuracy & High Precision
• High Accuracy & Low Precision
• Low Accuracy & High Precision
• Low Accuracy & Low Precision

The students measured length during a science experiement, they got 12 cm. But the actual measurement was 14.25 cm. What was the percent error?

• 15.79%
• 18.75%
• 2.25%
• 18%

Volume?

• 63.50 mL

• 63.5 mL

• 63.55 mL

• 6 mL

Measurements: 12.3, 14.5, 10.1, 16.9

True Value: 25.0

These measurements are…

• Accurate, but not precise

• Precise, but not accurate

• Both precise and accurate

• Neither precise nor accurate

Convert 300 meters to centimeters:

• 3000 cm
• 0.3 cm
• 30,000 cm
• 3 cn