Ch.2: Measurement and Problem Solving Flashcards Preview

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Flashcards in Ch.2: Measurement and Problem Solving Deck (22)
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1

2 rules to express a number in scientific notation:

1. move the decimal point to obtain a number between 1-10
2. Positive- right Negative- left

2

6 rules to determine the number of significant figures in a number

1. all NONZERO digits are significant
2. ZEROS BETWEEN NUMBERS are significant
3. Zeros to the right of a nonzero number that fall after a decimal point are significant
4. ZEROS to the LEFT of the first nozero number are not significant (.0005)
5. Zero's with no decimal point are not significant

3

The most convenient system for science measurement is based on the metric system and is called

International System SI

4

the base unit of length

meter

5

the base unit of mass

kilogram

6

the base unit of time

seconds

7

the _____ of an object is a measure of quantity of matter within it, while the weight of an object is a measure of the gravitational pull on that matter

mass

8

List: kilo
SYMBOL
MEANING
MULTIPLIER

K
thousand
10^3

9

Hecto:
SYMBOL
MEANING
MULTIPLIER

h
hundred
10^2

10

Deca:
SYMBOL
MEANING
MULTIPLIER

da
ten
10

11

Deci:
SYMBOL
MEANING
MULTIPLIER

d
tenth
10^-1

12

Centi
SYMBOL
MEANING
MULTIPLIER

c
hundreth
10^-2

13

milli
SYMBOL
MEANING
MULTIPLIER

m
Thousandth
10^-3

14

micro
SYMBOL
MEANING
MULTIPLIER

u
Millionth
10^-6

15

nano
SYMBOL
MEANING
MULTIPLIER

n
billionth
10^-9

16

Conversion Equivalents: inches=centimeters
1 inch=

2.54 centimeters

17

Conversion Equivalents: quart=pints
1 quart=

2 pints

18

Conversion Equivalents: Quart=mL
1 quart=

946 mL

19

Conversion Equivalents: Pounds to Kg
1 kg

2.2 pounds

20

4 step Problem-Solving Strategy

identify the given information
identify what you must find
Strategize
Solve

21

EQUATION OF DENSITY

MASS/ Volume

22

Density of water

1.0