Numbers in Science Chapter 2. Measurement. What is measurement? Quantitative Observation Based on a comparison to an accepted scale. A measurement has 2 Parts – the Number and the Unit Number Tells Comparison Unit Tells Scale There are two common unit scales English Metric. The Unit.
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
in milliliters (mL)
Any idea what the three most common temperature scales are?
1. Locate the Decimal Point : 1,438.
2. Move the decimal point to the right of the non-zero digit in the largest place
- The new number is now between 1 and 10
3. Now, multiply this number by a power of 10 (10n), where n is the number of places you moved the decimal point
- In our case, we moved 3 spaces, so n = 3 (103)
4. Determine the sign on the exponent n
If the decimal point was moved left, n is +
If the decimal point was moved right, n is –
If the decimal point was not moved, n is 0
Try it for these numbers: 2.687 x 106 and 9.8 x 10-2
1.34 x 1012
6.97 x 105
9.12 x 10-12
If the digit to be removed
In a series of calculations, carry the extra digits to the final result and then round off
Don’t forget to add place-holding zeros if necessary to keep value the same!! Round 80,150,000 to 3 sig figs.
Answers must be in the proper number of significant digits!!!
Fundamental Unit 100
% error = measured value – accepted value x 100%