Chapter 2

Question 1

qualitative

Answer 1

data made by observation

Question 2

quantitative

Answer 2

data made by numerical value

Question 3

Quantity

Answer 3

It has size or magnitude or amount

Question 4

What are the SI units for length?

Answer 4

meter (m)

Question 5

What are the SI units for mass?

Answer 5

mass (kg)

Question 6

What are the SI units for time?

Answer 6

seconds (s)

Question 7

What is the derived unit for volume?

Answer 7

length3: cubic decimeter (dm3)

Question 8

What is the derived unit for density?

Answer 8

mass/volume

Question 9

What is a kilo?

Answer 9

1000

1 x 10^3

Question 10

What is a centi (c)?

Answer 10

0.01

1 x 10^-2

Question 11

What is a milli (m)?

Answer 11

0.001

1 x 10^-3

Question 12

What is a micro?

Answer 12

0.000001

1 x 10^-6

Question 13

accuracy

Answer 13

how close your measurement is to the actual value; indicated by the percent error

Question 14

Precision

Answer 14

how close your measurements are to each other; indicated by the uncertainty

Question 15

percent error

Answer 15

((experimental- true)/true) x 100

Question 16

uncertainty

Answer 16

depends on measuring device; (smallest division/2)

Question 17

What are the rules of measurement?

Answer 17

record all visible digits and estimate one more

give a number, a unit, uncertainty

Question 18

What are the rules for determining significant figures?

Answer 18

1. all non zeros
2. any counted or exact number (ex: 1,000 m = 1 km)
3. a zero is significant if it looks like ex: 100.
4. zero sandwich: appearing between non zero significant digits
5. a zero that is at the end of a number AND after the decimal

Question 19

How do you multiply/divide with significant figures?

Answer 19

count the number of SIGFIGS in each number in the problem. The answer can only contain the lowest number of SIGFIGS

Question 20

How do you add/subtract with significant figures?

Answer 20

count the number of DIGITS AFTER THE DECIMAL POINT in each number in the problem. The answer can only contain the lowest number of digits after the decimal

Question 21

What do you do if there are not enough sig figs in the answer?

Answer 21

Put it in scientific notation

Question 22

significant figures

Answer 22

a prescribed decimal place that determines the amount of rounding off to be done based on the precision of the measurement

Question 23

How do you set up the conversion factors formula when converting from prefix to prefix?

Answer 23

Go from numerator to denominator with metric equalities