Significant Figures Quiz

What is the primary purpose of significant figures in scientific measurements?

• To increase the value of measurements

• To ensure measurements are always exact

• To make calculations more complex

• To communicate the reliability and precision of measurements

When reading a thermometer, why is an estimated digit added?

• To ensure the reading is always a whole number

• To confuse the reader

• To account for the uncertainty between marked intervals

• To make the reading look more precise

How many significant figures are in the measurement 28.6 degrees with an estimated digit?

• Three

• Two

• Four

• Five

What is the rule for determining significant figures in a number with a decimal point?

• Count all digits including leading zeros

• Ignore all zeros

• Count all digits from the leftmost non-zero digit to the right

• Count only the non-zero digits

In scientific notation, what determines the number of significant figures?

• The decimal point

• The exponent

• The coefficient

• The number of zeros

What is the significance of a trailing zero in a number with a decimal point?

• It is never counted

• It is only significant if followed by a non-zero digit

• It is significant as it indicates precision

• It is always insignificant

Which of the following has unlimited significant figures?

• Exact numbers

• Rounded numbers

• Measured quantities

• Approximations

How should significant figures be handled in multiplication and division?

• Do not round at all

• Round to the most number of significant figures

• Round to the least number of significant figures

• Round to the least number of decimal places

In addition and subtraction, how is the result rounded?

• To the least number of significant figures

• To the least number of decimal places

• To the most number of decimal places

• To the nearest whole number

Why is it important to use significant figures in calculations?

• To make calculations easier

• To avoid using scientific notation

• To ensure the result is as precise as the least precise measurement

• To increase the number of digits in the result