LESSON 2: MEASUREMENT AND SEPERATION TECHNIQUES

Question 1

these are the observations of the physical and chemical properties and changes that matter undergoes that are often reported QUANTITATIVELY

Answer 1

MEASUREMENT

Question 2

QUANTIFY the property of an object and gives full context to the numbers of the property being measured

Answer 2

UNITS

Question 3

invented by FRENCH in the 18th century; based on the powers of ten

Answer 3

METRIC SYSTEM

Question 4

system used in some US countries

Answer 4

ENGLISH SYSTEM

Question 5

1960; GLOBAL standard definition of units of measurement that would remain the same REGARDLESS OF THE PLACE where it is used

Answer 5

INTERNATIONAL SYSTEM OF UNITS (SI UNITS)

Question 6

other units of measurement obtained by a combination of base units

Answer 6

DERIVED UNITS

Question 7

SEVEN STANDARD BASE UNITS

Answer 7

length
mass
time
temperature
amount of substance
electric current
luminous intensity

Question 8

BASE UNITS:
length

Answer 8

meter

Question 9

BASE UNITS:
mass

Answer 9

kilogram

Question 10

BASE UNITS:
time

Answer 10

second

Question 11

BASE UNITS:
temperature

Answer 11

kelvin

Question 12

BASE UNITS:
amount of substance

Answer 12

mole

Question 13

BASE UNITS:
electric current

Answer 13

ampere

Question 14

BASE UNITS:
luminous intensity

Answer 14

candela

Question 15

SYMBOL:
length

Answer 15

m

Question 16

SYMBOL:
mass

Answer 16

kg

Question 17

SYMBOL:
time

Answer 17

s

Question 17

SYMBOL:
time

Answer 17

s

Question 18

SYMBOL:
temperature

Answer 18

K

Question 19

SYMBOL:
amount of substance

Answer 19

mol

Question 20

SYMBOL:
electric current

Answer 20

A

Question 21

SYMBOL:
luminous intensity

Answer 21

cd

Question 22

UNITS DERIVED FROM SI BASE UNITS

Answer 22

density
speed
energy

Question 23

BASE UNITS:
density

Answer 23

gram per cubic meter

Question 24

BASE UNITS: speed

Answer 24

meter per second

Question 25

BASE UNITS: energy

Answer 25

joule

Question 26

SYMBOL: density

Answer 26

g/m3

Question 27

SYMBOL: speed

Answer 27

m/s

Question 28

SYMBOL: energy

Answer 28

J *note: 1J = (kg)(m2)/s2

Question 29

OPERATIONS WITH SIGNIFICANT FIGURES

Answer 29

addition, subtraction, multiplication and division

Question 30

TRUE OR FALSE: when two measurements are added or subtracted, the sum or difference MUST HAVE THE SAME NUMBER of decimal places as the measurement with the FEWEST number of decimal places

Answer 30

TRUE

Question 31

TRUE OR FALSE: when two measurements are added or subtracted, the sum or difference MUST NOT HAVE THE SAME NUMBER of decimal places as the measurement with the FEWEST number of decimal places

Answer 31

FALSE

Question 32

TRUE OR FALSE: measurements that are multiplied or divided will FOLLOW the LEAST number of significant figures from the original measurement

Answer 32

TRUE

Question 33

TRUE OR FALSE: measurements that are multiplied or divided will NOT FOLLOW the LEAST number of significant figures from the original measurement

Answer 33

FALSE

Question 34

combination of trueness and precision

Answer 34

ACCURACY

Question 35

NEARNESS of measurement to the TRUE VALUE

Answer 35

TRUENESS

Question 36

NEARNESS of the values of MULTIPLE MEASUREMENTS TO EACH OTHER

Answer 36

PRECISION

Question 37

involves the SEPARATION of the SOLID component of a mixture from its LIQUID component; and solids mixed with gases

Answer 37

FILTRATION

Question 38

mixture passes through _____ or membrane that enables liquids or gases to pass but solids

Answer 38

porous surface

Question 39

separated solids

Answer 39

RESIDUE

Question 40

gas without the solid components

Answer 40

FILTRATE

Question 41

separate two or more different liquids and gases that form a mixture

Answer 41

DISTILLATION

Question 42

can also be used to separate solids that are small for porous membranes to separate from their fluid medium, relies on volatilities of components

Answer 42

DISTILLATION

Question 43

condensed vapor

Answer 43

DISTILLATE

Question 44

can be used to separate constituent parts of a mixture, particularly homogenous mixtures fixed medium could be a paper, gel, or cellulose

Answer 44

CHROMATOGRAPHY

Question 45

PHYSICAL METHODS OF SEPERATION

Answer 45

filtration distillation chromatography