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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 non-zero 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.