(Savvas 1.3) Measurement Worksheet Quiz

Scientific notation expresses a value as the product of a number between 1 and 10 and​ (a)  

• 100
• 1000
• 0.1
• 10 to some power

Choose the letter of the value that is expressed as 3 × 10^8.

• a. 300

• b. 300,000

• c. 30,000,000

• d. 300,000,000

Why is scientific notation useful?

• It simplifies calculations.

• It makes large numbers easier to read.

• It is used in scientific research.

• All of the above.

Choose the letters of elements that are required for a measurement to make sense.

• a. scientific notation

• b. numbers

• c. exponents

• d. units

Answer explanation

Numbers and units are essential for a measurement to make sense as they provide the quantitative value and the scale of the measurement, respectively.

Is the following sentence true or false? Units in the SI system include feet, pounds, and degrees Fahrenheit.

• True

• False

Answer explanation

The correct answer is False because units in the SI system do not include feet, pounds, and degrees Fahrenheit.

Match the SI base unit with the quantity that is used to measure.

• time

• Kelvin

• mass

• second

• temperature

• kilogram

• length

• meter

A ratio of equivalent measurements that is used to convert a quantity expressed in one unit to another unit is called a(n) ________.

• conversion factor

• measurement ratio

• unit rate

• proportional constant

Answer explanation

A ratio of equivalent measurements that is used to convert a quantity expressed in one unit to another unit is called a conversion factor.

Choose the letter of each expression that has four significant figures.

• 1.25 × 10^4

• 12.51

• 0.0125

• 0.1255

Answer explanation

The expressions with four significant figures are 12.51 and 0.1255, as they have non-zero digits after the decimal point, which count towards the significant figures.

Is the following sentence true or false? The precision of a calculated answer is limited by the least precise measurement used in the calculation.

• True

• False

Answer explanation

The correct answer is True because the precision of a calculated answer is indeed limited by the least precise measurement used in the calculation.

Calculate the density if the mass of a solid material is measured as 15.00 grams and its volume is measured as 5.0 cm^3. Round off your answer to the proper number of significant figures.

• 2.5 g/cm^3

• 3.0 g/cm^3

• 3.5 g/cm^3

• 4.0 g/cm^3

Answer explanation

Density is calculated by dividing mass by volume. In this case, 15.00 g / 5.0 cm^3 = 3.0 g/cm^3. The answer is rounded to the proper number of significant figures.