the key to understanding science. students will… … identify the difference in a quantity and a...
TRANSCRIPT
Measurement and
Calculations
The key to understanding science
Students will… … identify the difference in a quantity and a
unit. …Distinguish the SI unit and their use. …Perform Density Calculations. …Calculate Conversion Factors.
Learning Goals
Length Mass Time Temperature Amount of Matter Electric Current Luminal intensity
The SI base Units
Symbol: l Unit Name: Meter Unit Symbol: m
Length
Symbol: m Unit Name: Kilogram Unit Symbol: kg
Mass
Symbol: t Unit Name: Second Unit Symbol: s
Time
Symbol: T Unit Name: Kelvin Unit Symbol: K
Temperature
Symbol: n Unit Name: Mole Unit Symbol: mol
Amount of Substance
Symbol: I Unit Name: ampere Unit Symbol: A (sometime amp)
Electric Current
Symbol: Iv Unit Name: Candela Unit Symbol: cd
Luminosity
Prefix Unit symbol Value Reference
Mega- M 10^6 Roughly 600 miles
Kilo- k 10^3 .6 miles
Deka- da 10^1 330 yards
Base - 10^0 39 inches
Deci- d 10^-1 3.9 inches
Centi- c 10^-2 .39 of an inch
Milli- m 10^-3 Wire of a paper clip
Micro- μ 10^-6 hair
Nano- n 10^-9 bacteria
Pico- p 10^-12 The chances of winning Powerball
Area Volume Density Molar Mass Molar Volume Energy
SI Derived Units
Symbol: A Unit Name: square meter Unit Symbol: m ²
Formula: Varies◦ Rectangle: length x width
Area
Symbol: V Unit Name: cubic meter Unit Symbol: m³
Formula: Varies ◦ Rectangle: Height x width x length
Volume
Symbol: D Unit Name: kilograms per cubic meter Unit Symbol: kg/ m³
We use grams so it will be g/cm³
Density is the ratio of the mass to the volume of a sample of matter.
Density
Symbol: M or MM or MW Unit Name: kilograms per mole Unit Symbol: kg / mol
We will use g/mol normally
Molar Mass
Symbol: Vm
Unit Name: cubic meters per mole Unit Symbol: m³/mole
We will use cm³/mol in this class.
Molar Volume
Symbol: E Unit Name: Joule Unit Symbol: J
Formula: Force x Length
Energy
Are ratios base on the equality of two different units to be converted into one another.
4quarters = 1 1 Dollar
Conversion Factors
Is the method that allows you to solve problems using measurements.
Dimensional Analysis
Significant Figures Scientific Notation And….. The Calculator tool for good or
secret threat to mankind.
All that and More in
Next Time in Chemistry