Ch. 3.1 Measurements & Their Uncertainty - Part 1

Ch. 3.1 - Part 1

Measurements & Their Uncertainty

Multiple Choice

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

• raised to a power of 10

• squared

• cubed

• multiplied by 10

Multiple Choice

Select the letter of the value that is expressed as 3 x 10⁵

• 300

• 300,000

• 30,000,000

• 300,000,000

Multiple Choice

Select the choice of the notation that 0.00025 could be expressed as.

• 2.5 x 10³

• 2.5 x 10^-4

• 25 x 10^-5

• 2.5 x 10⁴

Fill in the Blank

125,000 m in proper scientific notation would be (include units in your answer)

Format your answer like this: 1.25E[insert exponent here] m

Fill in the Blank

602,000,000,000,000,000,000,000 atoms in proper scientific notation would be (include units in your answer)

Format your answer like this: 6.02E[insert exponent here] atoms

Fill in the Blank

125.00000 m in proper scientific notation would be (include units in your answer)

Format your answer like this: 1.25E[insert exponent here] m

Fill in the Blank

0.000056 g in proper scientific notation would be (include units in your answer)

Format your answer like this: 5.6E[insert exponent here] g

Multiple Choice

True or False? Precision is a measure of how close one measurement is to another.

• True

• False

Open Ended

Describe the difference between precision and accuracy.

Fill in the Blank

Determine the percent error of a balance that weighs a 500 g mass as 458 g.

Include the % symbol in your answer and round to the nearest whole number.

Fill in the Blank

Determine the percent error of a student who calculates the density of nickel to be 5.59 g/mL when nickel's density is 6.44 g/mL.

Include the % symbol in your answer and round to the nearest whole number.