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48 Cards in this Set
 Front
 Back
Mass (not weight)

kilogram (kg)


Length

meter (m)


Temperature

kelvin (K)


Time

second (s)


Pure substance amount

mole (mol)


Electric current

ampere (A)


Light brightness (wavelength)

candela (cd)


tera (T)

10^12


giga (G)

10^9


mega (M)

10^6


kilo (k)

10^3


deca (da)

10^1


deci (d)

10^1


centi ©

10^2


mili (m)

10^3


micro (u)

10^6


nano (n)

10^9


pico (p)

10^12


Significant figures

the number of digits written after the decimal point to measure a quantity


9.107

4, zero in the middle is significant


401

3, zero in the middle is significant


0.006

1, leading zeros are never significant


800 km

3, zeros are significant in measurements unless otherwise indicated


3.002 in

4, zeros in the middle of nonzero digits are significant


0.096

2


13.42 cm

4


0.0027

2


0.000001002

4


0.00000004

4 x 10^8


40 lb potatoes x $0.45 per lb = $18.00

$18 since the first number is only measured in two places


Precision

The closeness of two sets of measured groups of values.


Scientific method

A logical approach to solving problems by observing and collecting data, forming a hypothesis, testing it, theories and a conclusion.


System

A specific portion of matter in a given region of space that has been selected for experiments or observation.


Hypothesis

A testable statement.


Model

An explanation of how something occurred


Theory

A broad generalization that explains situations.


Quantity

Something with size or an amount.


SI

Le Systeme International d'unites.


Weight

The measure of the gravitational pull.


Derived units

Combinations of SI base unit forms.


Volume

The amount of space occupied by an object.


Density

Mass / Volume – the ratio of mass to volume, or mass divided by volume.


Conversion factor

A ratio derived from the equality between two different units that can convert.


Accuracy

How close a single measurement is to its true value.


Percent error

Subtracting the experimental value from the accepted value, dividing the difference by the accepted value x 100.


Scientific notation

Numbers written in n x 10^s.


Directly proportional

Two quantities that are divided to each other to get a constant value.


Inversely proportional

Two quantities that have a product that is a constant.
