作词 : Macfadden
Lesson 6:The Lecture -Jurassic 5
OK let's begin
Compound:A substance composed of two or more elements chemically combined in definite proportions by weight
Mixture:Two or more substances that are not chemically united such as air
Solution:A uniform mixture of varying proportions of a solvent and a solute
For many of our students this is the lesson you've been waiting for
Lesson Six
Left channel
Right channel
Hydrogen H 1
Sodium Na 1
Magnesium Mg 2
Aluminum Al 3
Potassium K 1
Calcium Ca 2
Chromium Cr 2three six
Any physical difficulty with a record or a turntable is taken care of
Do you think that Led Zeppelin and Frank Sinatra would go together
No
Combinations of music
You're about to play a sole 45RPM recording
But the turntable is set at 33and 1/3
And the record plays very slowly
Let's pick up the tempo a bit eh
Now let us imagine you are in the middle of your Disk Jockey program
This is the mark of a professional
Yeah if you could throw a couple   yeah uhuh
Right when he's playin'the drum
Let him play a couple'beats alone
Eeeeuuh
Uh
Oh I'm sorry I had the turntable at the wrong speed
Listen
Scratching --The greatest thing on earth
What do you do
What do you do
Drop
Chemical change:a change that alters the composition of the