Apologia HS Chemistry Module 1-

Vocabulary

100

the study of matter

chemistry

200

anything that takes up space and has mass

matter

300

an indication of how close a measurement is to the true value

accuracy 

400

A digit in a measurement that is either nonzero, a zero that is between 2 significant figures, or a zero at the end of the number and to the right of the decimal

significant figure

500

an indication of the scale on the measuring device that was used

precision

Metric System

100

basic unit of mass

gram

200

base unit of distance

meter

300

base unit of liquid

liter

400

meaning of the prefix kilo

1,000

500

meaning of the prefix milli (can be written two ways!)

0.001 of 1/1000

Scientific Notation

100

write 1.204 x 10^-2 in standard form

0.01204

200

write 25067 in scientific notation

2.5067 x 10⁴

300

write 0.00532 in scientific notation

5.32 x 10^-3

400

write 4.2 x 10⁴ in standard notation

42,000

500

write 2.34 x 10^-6 in standard notation

0.00000234

Significant Figures

100

number of significant figures 3.234

4

200

number of significant figures 6.0016

5

300

number of significant figures 105.340

6

400

What is the rule for adding and subtracting using significant figures

round your answer so that it has the same precision as the least precise measurement in the calculation (least number of decimal places)

500

what is the rule for multiplying and dividing significant figures

round the answer so that it has the same number of significant figures as the measurement with the fewest significant figures

Measurement Problems

100

25.0-10.21

14.8

200

120.70-3.525

117.18

300

4.59/2

2

400

0.0062/2

0.003

500

9,321 g to kg

9.321 kg