Unit 2 - Measurement Review

Scientific Notation & Sig Figs

100

How do you express the number 0.00056 in scientific notation?

5.6×10⁻⁴

200

How many significant figures are in the number 0.04500?

4 significant figures

300

Round the number 128,437 to 3 significant figures.

1.28 × 10⁵ or 128000

400

What is the rule for determining significant figures when multiplying/dividing

Round to the least number of decimal places used in the calculation.

500

Perform the following multiplication with correct significant figures: 4,852 × 2.1.

10000 (2 sig figs tho)

Unit Conversions

100

Convert 1500 milliliters to liters.

1.5 liters

200

How many grams are in 2.5 kilograms?

2500 grams

300

Convert 6.25 cm³ to liters.

0.00625 liters

400

Convert 5.00 x 10⁶ micrograms to grams. (micro is 1x-6)

5.00 grams

500

How many minutes are in 25 centuries 

1.3e9 minutes

Density

100

What is the formula for calculating density?

Density = Mass / Volume

200

A block of metal has a mass of 50 grams and a volume of 25 cm³. What is its density?

2 g/cm³

300

What volume will 40 g of a substance with a density of 4 g/cm³ occupy?

10 cm³

400

If the accepted density of a material is 8.9 g/cm³ but a student measures it as 9.2 g/cm³, what is the percent error?

3.37%

500

A brick has a mass of .75 kg and occupies a volume of 100. mL. Will it float or not (prove it)

sink 7.5 > 1 

Dimensional Analysis

100

Convert 2 meters to centimeters.

200 centimeters (1 sf)

200

If a car uses 5 gallons of fuel to travel 200 miles, how many miles per gallon does the car get?

40 miles per gallon

300

How many meters are in 1 km?

1000 m

400

Convert 35.0 cg to g

.350 g

500

A container holds 7.5 x 10⁶ liters of water. Convert this to cubic centimeters. (1 mL = 1 cm³)

7.5 x 10⁹ cm³

Accuracy & Precision

100

Define accuracy.

How close a measured value is to the actual or true value.

200

Define precision.

How close repeated measurements are to each other.

300

The results of an experiment are 3.4 g, 3.6 g, and 3.5 g. The expected result is 3.8 g. Are these results accurate, precise, or both?

Precise, but not accurate

400

Which is more precise: a beaker or a graduated cylinder? Explain WHY

A graduated cylinder

500

A student measures the volume of a liquid to be 25.5 mL when the actual volume is 26.0 mL. Calculate the percent error.

1.92%