Significant Figures in Measurement

Why are significant figures important in measurements?

• They are used to convert units.

• They make calculations easier.

• They indicate the precision of a measurement.

• They help in guessing the exact value.

When reading a thermometer with markings of 1 degree Celsius, which digit is estimated?

• None

• Third digit

• First digit

• Second digit

What determines the number of significant digits in a measurement?

• The size of the object being measured

• The precision of the measuring device

• The temperature of the environment

• The type of material being measured

Which of the following is true about included zeros in a measurement?

• They are significant only if they are at the beginning.

• They are significant only if they are at the end.

• They are never significant.

• They are always significant.

How many significant figures are in the number 2035?

• Two

• Five

• Four

• Three

What is the rule for trailing zeros in a non-decimal number?

• They are significant only if followed by a decimal point.

• They are not significant.

• They are always significant.

• They are significant only if they are in the middle.

When multiplying or dividing measurements, how do you determine the number of significant figures in the result?

• By the average number of significant figures in the measurements

• By the smallest number of significant figures in the measurements

• By the largest number of significant figures in the measurements

• By the total number of significant figures in the measurements

In addition and subtraction, what limits the precision of the final answer?

• The number with the fewest decimal places

• The number with the most decimal places

• The number with the fewest significant figures

• The number with the most significant figures

What is the density of an unknown metal if its mass is 80.01 grams and its volume is 7.61 milliliters?

• 10.51 grams per milliliter

• 10.5 grams per milliliter

• 10.5001 grams per milliliter

• 10.501 grams per milliliter

What does the final answer of a calculation involving significant figures reflect?

• The average precision of all measurements

• The precision of the least precise measurement

• The total number of measurements

• The precision of the most precise measurement