Measurements
Measurements
A scientific measurement is reported as a quantity and a unit.
The quantity tells the magnitude of the measurement
The unit tells the type and scale of the measurement
Scientific Notation
Used to Simplify large numbers
composed of two parts:
A decimal between 1 and 10 with a single digit to the left of the decimal and any additional numbers after it
A multiplier that is 10 is raised to a given power by the subscribed component
To convert, move the decimal from the left to 11 the number is between 1 and 10
The number of places moved equals the exponent
positive exponent
For numbers less than one, move the decimal from the right
negative exponent
Units
The units for many scientific measurements come from - the metric system
Two parts
base unit
prefix
base units
meter 1 (m)
length
liter (1)
volume
gram
mass
Prefixes
Indicates the base init is multiplied by factors of 10
Some Prefixes create a multiple of the original unit
1 kilogram=1,000 grams
1 Mega meter = o 1,000,000 meters
other prefixes create a fraction the original unit
1 centimeter = 14 60 of a meler
1 milimeter= 1/1,000 of a meter
1 microgram = 111,00 0,000 of a gram
units con.
When a measurement is very large or very small, use prefixes
make the number more measurable
Quantity can be measured in 2 different ways
Stand and natation - the normal number is
Scientific notation