Question

significant figures- significant figures in calculations- and accuracy and precision
significant figures
significant figures in measurement
fill in the blanks
counting is a type of measurement that is free from _, provided the number of objects being counted does not change while the counting process is underway. the result of such a counting measurement is an example of an _ number.
quantities derived from measurements other than counting, however, are uncertain to varying extents due to practical limitations of the _ process used.
significant figures in measurement
to measure the volume of liquid in a graduated cylinder, you should make a reading at the bottom of the _, the lowest point on the curved surface of the liquid.
the bottom of the meniscus in this case clearly lies between the 21 and 22 markings, meaning the liquid volume is certainly greater than _ ml but less than _ ml.
the meniscus appears to be a bit closer to the 22 - ml mark than to the 21 - ml mark, and so a reasonable estimate of the liquids volume would be _ ml.
all digits that are part of a measurement are _. however, in some measurements we must include zeros as place holders, it is these zeros that are not _.
you can say with certainty that the volume is between 200 and 300 ml and you can make an estimate that the volume is closer to _ than to _. your estimated digit would be in the tens place.
in this example the 0 is not part of the measurement, as it is neither a certain nor estimated digit, it is a _ and therefore not a significant digit.

Explanation:

Counting is free from uncertainty and gives an exact number. Non - counting measurements have uncertainty due to the measurement process. When measuring liquid volume in a graduated cylinder, read at the bottom of the meniscus. If the meniscus is between markings, estimate the volume. Significant digits are part of a measurement, and place - holding zeros are not significant.

Answer:

1. uncertainty; exact
2. measurement
3. meniscus
4. 21; 22
5. 21.7 (a reasonable estimate, could vary slightly depending on interpretation)
6. significant digits; significant
7. 250; 200 (for example, assuming a mid - range estimate between 200 and 300, could vary based on context)
8. place - holder