Measurements and Dimensional Analysis

Question 1

Significant figures rules

Answer 1

nonzero numbers are always significant
zeros between non-zero numbers are always significant
all final zeros to the right of the decimal are significant
placeholder zeros are not significant

Question 2

Addition and subtraction

Answer 2

the number of decimal places in the result equals the number of decimal places in the least precise measurement

Question 3

Multiplication and division

Answer 3

round the answer to the least # of sig figs in the problem

Question 4

Qualitative observations

Answer 4

observation of where the person observes by their interpretation, by what they see

Question 5

Precision

Answer 5

related to the reproducibility to the measurement

Question 6

Accuracy

Answer 6

a comparison of the measured value to the accepted or true value

Question 7

Scientific notation

Answer 7

the way that scientists easily handle very large numbers or very small numbers

Question 8

Conversion factor

Answer 8

a statement used to change one set of units to another by multiplying or dividing

Question 9

Base units

Answer 9

a defined unit in a system of measurement that is based on an object or event in the physical world.