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Mathematics and Science

Mathematics and Science. Chapter 1, Section 4 Page 30. Section 4: Mathematics and Science. What math skills do scientists use in collecting data and making measurements?. Accuracy and Reproducibility. Accuracy: how close a measurement is to the true or actual value.

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Mathematics and Science

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  1. Mathematics and Science Chapter 1, Section 4 Page 30

  2. Section 4:Mathematics and Science • What math skills do scientists use in collecting data and making measurements?

  3. Accuracy and Reproducibility Accuracy: how close a measurement is to the true or actual value. Reproducibility: how close a group of measurements are to one another. Scientists aim for both accuracy and reproducibility. This is why scientist do so many trials in an experiment; to check for accuracy and reproducibility.

  4. Significant Figures A measurement should contain only those numbers that are significant. Significant numbers include all the numbers you can measure exactly, plus one that is estimated.

  5. How many significant figures?

  6. How many significant figures?

  7. How many significant figures?

  8. Adding and Subtracting Measurements When you add or subtract measurements, your answers should have only the same number of decimal places as the measurement with the least number of decimal places. 6.78 cm (2 decimal places) + 23.5 cm (1 decimal place) 30.28 cm = 30.3 cm (1 decimal place)

  9. Multiplying Measurements When you multiply measurements, your answers can have only the same number of significant figures as the measurement with the fewest significant figures.

  10. To find the area of a surface, multiply its length by its width. Suppose a sheet of paper measures 27.5 cm by 21.6 cm. Area = 27.5 cm x 21.6 cm = 594 cm2 Practice Problem What is the area of a ticket stub that measures 3.5 cm by 2.2 cm? 3.5 cm x 2.2 cm = 7.7 cm2 Area

  11. Links on Math and Science • Click the SciLinks button for links on math and science.

  12. End of Section:Mathematics and Science

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