Measurements and Calculations

Question 1

SI

Answer 1

Le Système International d’Unités

adopted in 1960 by the General Conference on Weights and Measures

Question 2

metric prefixes

Answer 2

Question 3

area formula

Answer 3

area = length × width

Question 4

volume formula

Answer 4

volume = length × width × height

Question 5

density formula

Answer 5

density = mass ⁄ volume

Question 6

molar mass formula

Answer 6

molar mass = mass ⁄ amount of substance

Question 7

concentration formula

Answer 7

concentration = amount of substance ⁄ volume

Question 8

molar volume formula

Answer 8

molar volume = volume ⁄ amount of substance

Question 9

energy formula

Answer 9

energy = force × length

Question 10

percent error formula

Answer 10

Question 11

percent difference formula

Answer 11

Question 12

significant figures

Answer 12

all the digits known with certainty plus one final digit which is somewhat uncertain or estimated

Question 13

rounding the sum or difference of significant figures

Answer 13

round to the least number of decimals

Question 14

rounding the product or quotient of significant figures

Answer 14

round to the least number of significant figures

Question 15

adding numbers written in scientific notation

Answer 15

make sure both numbers have the same exponents (adjust if necessary) and add the coefficients

Question 16

subtracting numbers written in scientific notation

Answer 16

make sure both numbers have the same exponents (adjust if necessary) and subtract the coefficients

Question 17

multiplying numbers written in scientific notation

Answer 17

multiply the coefficients and add the exponents together

Question 18

dividing numbers written in scientific notation

Answer 18

divide the coefficients and subtract the exponent of the denominator from the exponent of the numerator

Question 19

direct proportion

Answer 19

two quantities that produces a constant value when one is divided by the other

Question 20

general equation for a directly proportional relationship

Answer 20

Question 21

expression of a directly proportional relationship

Answer 21

y ∝ x

Question 22

inverse proportion

Answer 22

two quantities that produces a constant value when multiplied

Question 23

general equation for an inversely proportional relationship

Answer 23

Question 24

expression of an inversely proportional relationship

Answer 24

Question 25

graph of a direct proportion

Answer 25

linear graph that passes through the origin

Question 26

graph of an inverse proportion

Answer 26

graph with hyperbola

Question 27

scientific notation

Answer 27

way of expressing numbers that are too big or too small to be conveniently written in decimal form

Question 28

observing

Answer 28

use of the senses to obtain information

Question 29

qualitative data

Answer 29

non-numerical information about qualities and cannot be measured or written down with numbers

Question 30

quantitative data

Answer 30

numerical information that can be measured and written down with numbers

Question 31

accuracy

Answer 31

closeness of measurements to the correct or accepted value of the quantity measured

Question 32

precision

Answer 32

closeness of a set of measurements of the same quantity

Question 33

SI base unit for length

Answer 33

meter

Question 34

SI base unit for mass

Answer 34

gram

Question 35

SI base unit for time

Answer 35

second

Question 36

SI base unit for temperature

Answer 36

kelvin

Question 37

SI base unit for amount of substance

Answer 37

mole

Question 38

SI base unit for electrical current

Answer 38

ampere

Question 39

SI base unit for luminous intensity

Answer 39

candela