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

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