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Apologia Chemistry Module 1
Measurement and units
Anything that has mass and takes up space
An indication of how close a measurement is to the true value
An indication of the scale on the measuring device that was used
1 cubic centimeter
A digit within a number is considered to be a significant figure if:
- it is non-zero OR
- it is a zero that is between two significant figures OR
- it is a zero at the end of the number and to the right of the decimal point
Significant figures when adding and subtracting
Round your answer so it has the same precision as the least precise measurement
Significant figures when multiplying or dividing
Round your answer so that it has the same number of significant figures as the measurement with the fewest number of significant figures
An object's mass divided by the volume that the object occupies
p = m/V