Chapter 2

Question 1

convert 1 meter into nano

Answer 1

1m = 10^9 nm

Question 2

convert 1 meter into milli

Answer 2

1m = 10^3 mm

Question 3

convert 1 meter into centi

Answer 3

1m = 100 cm

Question 4

dimensional analysis: rearrange the question 5 meters/seconds X (times) 10 seconds

Answer 4

5 x 10 x m/s x s. Then cross out the two s’. You then get 50 m

Question 5

why is it important to make measurements in science?

Answer 5

science is very quantitative and collects data

Question 6

Is metric used most in science true or false?

Answer 6

True

Question 7

all quantitative data requires a __ and a __ unit

Answer 7

number; unit

Question 8

what is the purpose of using scientific notation?

Answer 8

used to simply very large or very small numbers

Question 9

what are the two things required for scientific notation?

Answer 9

a number between 1 and 10, and a power of 10

Question 10

how would you write 0.000012 in scientific notation

Answer 10

1.2 x 10 ^-5

Question 11

ignore

Answer 11

ignore

Question 12

Scientific notation: if you have a very large number, it is represented as?

Answer 12

10^n

Question 13

Scientific notation: if you have a very small number, it is represented as

Answer 13

10^-n

Question 14

when you have a really big number, like 120000, what is the scientific notation? What would the process look like?

Answer 14

count/move the decimal place through each zero till you place the decimal spot in between 1 and 2. Then count the number of moves as the 10^n

Question 15

using a calculator: you replace 10 with what?

Answer 15

E on calculator

Question 16

Calculator: After you’ve used E for your equation, and want to see the number in scientific notation, what do you do?

Answer 16

press 2nd then SCI.

Question 17

Which SI unit and symbol is represented for Mass?

Answer 17

kilogram; kg

Question 18

Which SI unit and symbol is represented for length

Answer 18

Meter; M

Question 19

Which SI unit and symbol are represented for Time?

Answer 19

Second; S

Question 20

Which SI unit and symbol is represented for temperature

Answer 20

Kelvin; K

Question 21

Which SI unit and symbol are represented for amount?

Answer 21

Mole; mol

Question 22

Convert 1 meter into kilo

Answer 22

1m = 10^-3 km

Question 23

ignore

Answer 23

ignore

Question 24

when something says scaling factors, what does it mean?

Answer 24

the symbols used for measurements (kg, cm, m etc)

Question 25

Definition of mass

Answer 25

quantity of matter inside an object

Question 26

The process of determining mass is called?

Answer 26

weighing

Question 27

do not confuse mass with \_\_\_

Answer 27

weight

Question 28

what is the key difference between mass and weight?

Answer 28

mass is the quanity of matter in an object; weight is the gravitation force acting on an object's mass

Question 29

why is the kelvin scale important?

Answer 29

because it is based on molecular motion

Question 30

at 0 K, what is the kinetic energy?

Answer 30

zero kinetic energy

Question 31

when kelvin is at zero, celsius is at?

Answer 31

-273.15

Question 32

what are 2 examples of the derived units of area and volume?

Answer 32

cm^2; cm^3

Question 33

Density is the

Answer 33

ratio of mass to volume

Question 34

what is volume

Answer 34

the amount of space a substance has in a container

Question 35

solids = g/\_\_

Answer 35

cm^3

Question 36

liquids = g/\_\_

Answer 36

ml

Question 37

gases/g/\_\_

Answer 37

L

Question 38

ignore

Answer 38

ignore

Question 39

why do you use g/L when measuring gas?

Answer 39

because gas takes up a lot more space

Question 40

how do you determine volume?

Answer 40

by water displacement

Question 41

who discovered volume?

Answer 41

archimedes

Question 42

how would you approach the question: you find that a n in ml of a liquid weights n in g, what is the density?

Answer 42

n in g/n in ml

Question 43

what is the formula for density?

Answer 43

mass divided by the volume

Question 44

when you heat up an object, what happens to the density

Answer 44

it changes

Question 45

when a question uses the wording " it displaces by x amount" what are they really asking?

Answer 45

the volume

Question 46

density = what / divided by what

Answer 46

mass divided by volume

Question 47

what unit measurement is volume always displayed as \_\_\_

Answer 47

cm^3

Question 48

if you make measurements persistently but not accurately there is no scientific value

Answer 48

true

Question 49

what are the two types of errors?

Answer 49

random errors and systematic errors

Question 50

what are the most common type of errors

Answer 50

random errors

Question 51

meaning of random errors

Answer 51

-results from the limitations of the experimenters skills

Question 52

meaning of systematic errors

Answer 52

inherent errors in instruments and cause consistent errors

Question 53

how do you reduce random errors?

Answer 53

reduce by making repeat measurements

Question 54

what do you do if you run into systematic errors

Answer 54

you need to find the source of the error

Question 55

what is an example of a systematic error?

Answer 55

a faulty balance

Question 56

measuring meniscus in a container (its just a substance) the measurement looks concave. Which part do you measure?

Answer 56

the bottom of the concave meniscus

Question 57

always estimate __ the lines

Answer 57

between

Question 58

what are significant figures used for

Answer 58

used to express the uncertainty in a measurement

Question 59

6.003 - how many significant numbers

Answer 59

4

Question 60

0.00035 how many significant numbers

Answer 60

2

Question 61

0.00035000 how many significant numbers

Answer 61

5

Question 62

"trailing zeros" reffer to what

Answer 62

zeros that come after a significant number after a decimal point. IE: 0.035000 (the last three zeros are significant)

Question 63

10,000 has how many significant figures?

Answer 63

1

Question 64

do the zeros in 0.0025 count as significant numbers?

Answer 64

no

Question 65

101 - does the zero count as a significant number?

Answer 65

yes

Question 66

all non zero digits do/do not count as significant figures?

Answer 66

they do count

Question 67

zeros in-between number do or do not count as sig figs

Answer 67

they do count

Question 68

1.00, how many sig figs?

Answer 68

3

Question 69

differentiate the sig figs of 10,000. & 10,000

Answer 69

10,000. = 5 10,000 = 1

Question 70

how many sig figures have in 1.050

Answer 70

4

Question 71

150.0 has how many sig figs

Answer 71

4

Question 72

if 150 has 2 sig figs, how would you write it in scientific notation?

Answer 72

1.5 x 10^2

Question 73

if 150 has 3 sig figs, how would you write it in scientific notation?

Answer 73

1.50 x 10^2

Question 74

round these two significant figures to 2 sf: 3.15 & 1.36

Answer 74

3.2 1.4

Question 75

0.04450 has how any sig figs?

Answer 75

4

Question 76

when something has a definitive answer. How many sig figs are there?

Answer 76

infinite number

Question 77

how many sig figs in 1.000 x 10^5

Answer 77

4 - the digit 1 and the trailing 0's (just ignore the 10^5)

Question 78

how many sig figs in 0.00002

Answer 78

1 (do not count the leading zeros)

Question 79

determine the amount of significant figures and the range of precision: 0.00120 \*\*even if you get these right, put it that you got them wrong so you can practice more

Answer 79

3 sig figs - 0.00119 to 0.00121

Question 80

determine the amount of significant figures and the range of precision: 120. \*\*even if you get these right, put it that you got them wrong so you can practice more

Answer 80

3 sig figs, 119 to 121

Question 81

determine the amount of significant figures and the range of precision: 12.00 \*\*even if you get these right, put it that you got them wrong so you can practice more

Answer 81

4 sig - 11.99 to 12.01

Question 82

determine the amount of significant figures and the range of precision: 1.20 x 10^3 \*\*even if you get these right, put it that you got them wrong so you can practice more

Answer 82

3 sig figs 1190 to 1210

Question 83

what is the rule about multiplying/dividing significant figures

Answer 83

of sig figs in the answer should be the same as the measurement with the least number of sig figs

Question 84

sig fig addition/subtraction rule

Answer 84

the number of sig. figs. in the answer is limited by the least number of decimal place

Question 85

when multiplying 5.02 x 89.665 x 0.10, how many significant figures would the answer have?

Answer 85

2 sig figs (lowest sig figs in question was 0.10 (2 sig figs)

Question 86

1 ml = ___ g?

Answer 86

0.768

Question 87

1 ml= __ L?

Answer 87

10^-3

Question 88

1 kg = ___ g?

Answer 88

1000

Question 89

There are three rules on determining how many significant figures are in a number:

Answer 89

Non-zero digits are always significant. Any zeros between two significant digits are significant. A final zero or trailing zeros in the decimal portion ONLY are significant.

Question 90

a change in color, the formation of bubbles, the spontaneous increase or decrease in temperature are signs of a

Answer 90

chemical change

Question 91

a change in color, the formation of bubbles, the spontaneous increase or decrease in temperature are signs of a

Answer 91

chemical change

Question 92

# reversed chemical change

Answer 92

a change in color, the formation of bubbles, the spontaneous increase or decrease in temperature are signs of a

Question 93

phase changes are a

Answer 93

physical change

Question 94

\*reversed card - physical change

Answer 94

phase changes are a

Question 95

what are the qualitative observation to make for solids:

Answer 95

colour or colourless

Question 96

what are the qualitative observation to make on liquids and gas

Answer 96

liquids : colour or colourless, clear or cloudy gas - colour or colourless