Measurement

Direct Measurements-can actually be measured

Length-Distance, measured by a Metric Ruler (m)

Mass- amount of matter, measured by a balance (Kg)

Temperature-Hot or cold, measured by a thermometer (K)

Time-Duration, measure by stopwatch/timer (S)

Volume-amount of space, measured by graduated cylinder (L) *not an SI unit

*Celsius used in Science Temperature

Indirect (Derived) Units-need 2 or more measurements to calculate

Area (a)- =Lw

Volume (v) =Lwh

Density =m/v

SI-based on the power of 10

Prefixes

Giga- (G) billion or 10^9

Mega- (M) Million or 10^6

Kilo- (K) Thousand or 10³

Hecta- (H) Hundred or 10²

Deca- (da) Ten or 10^1

Base- One or 10^0

Deci- (d) Tenth or 10^-1

Centi- (c) Hundredth or 10^-2

Milli- (m) Thousandth or 10^-3

Micro- (u~) Millionth or 10^-6

Nano- (n) Billionth or 10^-9