Ch 1,2,3 Flashcards
(48 cards)
1
Q
Scientific Method
A
Observation —Law
Hypothesis
Experiment
Conclusion/ Theory
2
Q
Metric measurement for LENGTH
A
meter (m)
3
Q
Metric measurement for VOLUME
A
Liter (L)
4
Q
Metric measurement for MASS
A
gram (g)
5
Q
Metric measurement for TEMPERATURE
A
degree celsius (*c)
6
Q
Name 2 Unit Measurement for Volume
Measure liquid
A
Liter (L) and Milliliter (mL)
7
Q
1 Liter (L)=
A
1000 mL
8
Q
1 gal. =
A
4 qts.
9
Q
1 qt=
A
4 cups
10
Q
946 mL =
A
1 qt.
11
Q
Name 2 measurements for Length
A
Meter (m) and centimeter (cm)
12
Q
1m=
A
100 cm
13
Q
1 mi =
A
5280 ft
14
Q
1 yd =
A
3 ft
15
Q
2.54 cm =
A
1 in
16
Q
Name 2 measurements used for Mass
A
Gram (g) and Kilogram (kg)
17
Q
1 kg =
A
1000 g
18
Q
1 lb =
A
16 oz
19
Q
454 g =
A
1 lb
20
Q
Water freezes at
A
0C or 32F
21
Q
What prefixes make units smaller
A
Deci
Centi
Milli
Micro
22
Q
What prefix makes units larger
A
Kilo
23
Q
Kilo
A
Increases by 1000 x’s 10^3
I kg = 1000g
24
Q
Deci
A
(d)
0.1
10^-1
1g=10dg
25
centi
(c)
0.01
10^-2
1g=100cg
26
Milli
(m)
0.001
10^-3
1g=1000mg
27
Micro
(*)
0.000 001
10^-6
1g=1,000,000mcg
28
English Equalities for Length
| Ft,yd,mi
1ft=12in
1yd=36in=3ft
1mi=5280ft
29
English Equalities for Volume
| Gal,qt,pt,c,cm3(cc)
```
1gal=4qt
1qt=2pt
1pt=2c
1c=8floz
1cm3=1cc=1mL
```
30
English Equalities for Mass
| Lb, ton
1lb=16oz
| 1 ton=2000 lb
31
*English to Metric Equalities
Volume?
Length?
Mass?
Volume 1qt=946mL (round 3 sig fig)
Length 1in=2.54cm (exact)
Mass 1lb=454g (round 3 sig fig)
32
1000m=
1km
33
1g=
100cg
34
1L
1000mL
35
Write a conversion factor for this equality
| 60min=1hr
60 min = 1h
_______. ____
1h. 60min
36
Write a conversion factor for this equality
| 1m=100cm
100cm. =. 1m
______. _______
1m. 100cm
37
Convert: liters and milliliters
1L=1000mL
____ _____
1000. 1L
38
Convert centimeters to inches
2.54cm= 1in
________. ______
1in. 2.54cm
39
Convert meters and kilometers
1000m= 1km
_______. ______
1km. 1000m
40
Percentage Problems
| Name 2 rules
1. When it's a percent always denominate with 100
2. Use the same unit in the numerator and denominator
18% body fat by mass:
100 kg body mass= 18kg of body fat
__________________. _________________
18kg of body fat. 100kg of body mass
41
Problem solving using conversion factors
| Baby weighs 7lb and 14 oz. How many pounds only? Use decimal answer
7lb 14oz
14oz (1lb. )=0.875lb
______
16oz
7lb+0.875lb=7.875lb baby
42
Problem solving using conversion factors
| A rattlesnake is 2.44m long. How many cm long is the rattle snake?
2.44m=cm
2.44m(100cm)= 2.44cm
_________
1m
Cancel out m. 2.44x100=244cm
43
Problem solving using conversion factors
| A bottle contains 1.5 qts of wine. How many liters of wine is that?
1.5 qts =Liters
1.5 qts (946mL)(1L)=
_________. _____
1qt. 1000mL
1.5x946/100=1.419L
44
2 rules for numerator and denominators
Numerator: multiply
Denominator : down denominator divide
(Divide two multiplication )
45
Counting Significant Figures
1. ) Nonzero #'s are counted as significant
43. 987 5 sig.fig
2. ) Zero BEFORE the nonzero # is not significant : "Leading zero"
0. 43987 5 sig fig. 0.00086 kg 2 sig fig
3.) Zero BETWEEN nonzero # is a significant fig
6042mm 4 sig. 400009605mm 9sig
4.) zero AFTER nonzero # "Trailing zero"
-if there isn't a decimal point it is Not sig
-if there is a decimal point it Is sig
4800 dg. 2 sig fig. 19640 cg. 5 sigfig
0.007600007200 mL 10 sig fig (only last 2 zeros count because of decimal
5.) Exact Numbers: no equipment used
-no limitations -infinity of sig #s
A: definition 12 in=1ft : infinity s.f.
10 dg=1g: infinity s.f.
B: Numbers obtained by counting look at their label.
27 students Infinity
27 inches. 2 sig fig (used by ruler)
46
Significant conversion
Length 1 in= 2.54 cm. infinity sig definition
Volume 1qt= 946 mL. 3 sig calc round
Mass 1lb=454g. 3 sig calc round
Use metric are infinity except mL/L
47
Calculations with Significant figures
| ADD/ SUB
1. Calc and write answer down
2. Determine least precise (least info) original number
3. Final answer is limited to same decimal place(least precise #)
48
Calculations with Significant figures
| Mult/ Divide
1. Calculate write answer
2. Determine the # of sig fig in original #s
3. Final answer has same sig fig as original # with fewest sig fig
