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Audio 0:02:06.373427
Scientists have agreed on a set of international standard units for comparing all our measurements called the SI units
- Système International = International System
Audio 0:02:50.788800
Audio 0:05:08.029693
Matter - anything that occupies space and has mass.
- mass – measure of the quantity of matter
  - SI unit of mass is the kilogram (kg)
  - 1kg=1000g=1x10^3 g
- weight – force that gravity exerts on an object

Audio 0:13:15.114556
On 9/23/99, $125,000,000 Mars Climate Orbiter entered Mars’ atmosphere 100 km lower than planned and was destroyed by heat.
- “This is going to be the cautionary tale that will be embedded into introduction to the metric system in elementary school, high school, and college science courses till the end of time.”

Audio 0:17:51.208624
An extensive property of a material depends upon how much matter is is being considered.
- mass
- length
- volume
An intensive property of a material does not depend upon how much matter is being considered.
- density
- temperature
- color

Audio 0:22:15.274916
Density is
- an INTENSIVE physical property.
  - The physical property does not depend on amount of substance.
The physical properties of mass and volume that determine a substance’s density are EXTENSIVE.
- Extensive physical properties are dependent on amount.
Densities of liquids and gases are affected by temperature.
Audio 0:23:13.252741
Density – SI derived unit for density is kg/m^3
- 1 g/cm^3 = 1 g/mL = 1000 kg/m^3
density = mass / volume
- d = m/V

Piece of platinum with mass of 96.5g and a volume of 4.49 cm^3. Find the density of platinum

Audio 0:26:36.209585
Mercury has a density of 13.534 g/cm^3. A sample of mercury has a volume of 24 cm^3. Find the mass of the sample
Audio 0:29:40.010633
For equal volumes, denser object has larger mass
For equal masses, denser object has smaller volume
Heating an object generally causes it to expand, therefore the density changes with temperature

Audio 0:34:02.968553
25 C = 77 F = 298 K
- Celsius is what we use
- Water freezes at 0 C and boils at 100.
  - Logical. Fahrenheit isn’t
F to C => (9/5) * degrees Celsius + 32

Audio 0:38:13.441616
The number of atoms in 12 g of carbon: 602,200,000,000,000,000,000,000
- 6.022 * 10^3 atoms
Audio 0:39:05.792632
The mass of a single carbon atom in grams
- 0.0000000000000000000000199
- 1.99*10^-23
- N * 10^n
  - N is a number between 1 and 10
  - n is a positive or negative integer
Audio 0:40:49.588209

Audio 0:45:25.068840
changes in matter, both physical and chemical, result in the matter either gaining or releasing energy
energy is the capacity to do work
work is the action of a force applied across a distance
- a force is a push or a pull on an object
- electrostatic force is the push or pull on objects that have an electrical charge

Audio 0:47:25.068840
all matter possesses energy
energy is classified as either kinetic or potential
energy can be converted from one form to another
when matter undergoes a chemical or physical change, the amount of energy in the matter changes as well

Term	Definition
mass	measure of quantity of matter
weight	force that gravity exerts on an object
extensive property	property of a material which depends upon how much matter is is being considered
intensive property	property of a material which does not depend upon how much matter is being considered
energy	capacity to do work