Science, Tech, Math Science Significant Figures and Scientific Notation Test Questions Chemistry Test Questions Share Flipboard Email Print Science Chemistry Basics Chemical Laws Molecules Periodic Table Projects & Experiments Scientific Method Biochemistry Physical Chemistry Medical Chemistry Chemistry in Everyday Life Famous Chemists Activities for Kids Abbreviations & Acronyms Biology Physics Geology Astronomy Weather & Climate by Todd Helmenstine Updated June 07, 2018 This is a collection of ten chemistry test questions with answers dealing with significant figures and scientific notation. The answers are at the bottom of the page. Significant figures are used to keep track of uncertainty in measurements for experiments and calculations. They are a means of recording error. Scientific notation is used to express very large and very small numbers. This shorthand notation makes it easier to write numbers and also allows for accurate calculator operations. Question 1 Significant figures and scientific notation are used every day in chemistry measurements and calculations. Jeffrey Coolidge / Getty Images How many significant figures are in the following values?a. 4.02 x 10-9b. 0.008320c. 6 x 105d. 100.0 Question 2 How many significant figures are in the following values? -3 d. 731.2204 Question 3 Which value has more significant figures? -6 or 0.0000026 Question 4 Express 4,610,000 in scientific notation. d. with 5 significant figures Question 5 Express 0.0003711 in scientific notation.a. with 1 significant figureb. with 2 significant figuresc. with 3 significant figuresd. with 4 significant figures Question 6 Perform the calculation with the correct number of significant digits. 22.81 + 2.2457 Question 7 Perform the calculation with the correct number of significant digits. 815.991 x 324.6 Question 8 Perform the calculation with the correct number of significant digits. 3.2215 + 1.67 + 2.3 Question 9 Perform the calculation with the correct number of significant digits. 8.442 - 8.429 Question 10 Perform the calculation with the correct number of significant digits. 27/3.45 Answers 1. a. 3 b. 4 c. 1 d. 4 -6 6 6 6 6 -4 -4 -4 -4 5 10. 7.8 Tips for Solving Problems For scientific notation problems, remember you can perform operations on the decimal number and the exponent separately and then bring the calculations together in your final answer. For significant figures, you may find it helpful to write a number in scientific notation. This is an easy to see whether digits are significant or not, particularly leading zeros. Continue Reading