Science: SI Units Metric Prefixes and Unit Conversions Worksheet

Question 1

Convert 2.50 kilometers to meters.

Accepted Answer

2.50 kilometers is equal to 2500 meters because 1 kilometer equals 1000 meters.

Question 2

Convert 0.075 liters to milliliters.

Accepted Answer

0.075 liters is equal to 75 milliliters because 1 liter equals 1000 milliliters.

Question 3

A lab sample has a mass of 4500 milligrams. Convert this mass to grams.

Accepted Answer

4500 milligrams is equal to 4.5 grams because 1000 milligrams equals 1 gram.

Question 4

Convert 3.2 x 10^-6 meters to micrometers.

Accepted Answer

3.2 x 10^-6 meters is equal to 3.2 micrometers because 1 micrometer equals 1 x 10^-6 meters.

Question 5

Convert 0.000000850 seconds to nanoseconds.

Accepted Answer

0.000000850 seconds is equal to 850 nanoseconds because 1 nanosecond equals 1 x 10^-9 seconds.

Question 6

A plant stem is measured as 72 centimeters long. Convert the length to meters.

Accepted Answer

72 centimeters is equal to 0.72 meters because 100 centimeters equals 1 meter.

Question 7

Convert 4.0 cm^2 to m^2. Remember that area units must be squared.

Accepted Answer

4.0 cm^2 is equal to 0.00040 m^2, or 4.0 x 10^-4 m^2, because 1 cm^2 equals 1 x 10^-4 m^2.

Question 8

A liquid has a density of 1.20 g/mL. Convert the density to kg/L.

Accepted Answer

1.20 g/mL is equal to 1.20 kg/L because 1 gram per milliliter has the same numerical value as 1 kilogram per liter.

Question 9

A bacterium is about 2.0 micrometers long. Write this length in meters using scientific notation.

Accepted Answer

2.0 micrometers is equal to 2.0 x 10^-6 meters because the prefix micro means 10^-6.

Question 10

Arrange these prefixes from largest to smallest: kilo, milli, micro, centi, mega.

Accepted Answer

The prefixes from largest to smallest are mega, kilo, centi, milli, and micro.

Question 11

A car is traveling at 65 km/h. Convert this speed to m/s. Round to the nearest tenth.

Accepted Answer

65 km/h is equal to about 18.1 m/s because 65 x 1000 meters divided by 3600 seconds equals 18.1 m/s.

Question 12

A solution contains 12.0 grams of salt in 250 milliliters of solution. What is the concentration in grams per liter?

Accepted Answer

The concentration is 48.0 grams per liter because 250 milliliters is 0.250 liters and 12.0 grams divided by 0.250 liters equals 48.0 grams per liter.

Question 13

A green laser has a wavelength of 532 nanometers. Convert this wavelength to meters using scientific notation.

Accepted Answer

532 nanometers is equal to 5.32 x 10^-7 meters because 1 nanometer equals 1 x 10^-9 meters.

Question 14

Convert 0.0350 kilograms to centigrams.

Accepted Answer

0.0350 kilograms is equal to 3500 centigrams because 0.0350 kilograms equals 35.0 grams and each gram equals 100 centigrams.

Question 15

A rectangular block measures 8.0 cm by 5.0 cm by 2.0 cm. Find its volume in cm^3 and then convert the volume to milliliters.

Accepted Answer

The volume is 80 cm^3 because 8.0 x 5.0 x 2.0 equals 80. The volume is also 80 mL because 1 cm^3 equals 1 mL.

Science: SI Units Metric Prefixes and Unit Conversions