5.Lesson 6： The Lecture
edit.
Ok, lets begin!
Compound：a substance composed of two or more elements chemically
combined in
Definite proportions by wieght.
Mixtures： two or more substances that are not chemically united
such as air.
Soloution： a uniform mixture of varying proportions of a solvent
and a solute.
For many of our students this is the lesson youve been waiting
for!
Lesson...6
Left channel...
Right channel...
Hydrogen, h plus one.
Sodium, na plus one.
Magnesium, mg plus two.
Aluminum, al plus three.
Potassium, k plus one.
Calcium, ca plus two.
Chromium, cr plus two, three, six.
Any physical difficulty with a record, or a turntable
Is taken care of.
Do you think that led zepplin and frank sinatra would go
together？
Edit.
No.
Combinations of music.
Youre about to play a soul, 45rpm recording,
But the turntable is set at 33 and 1／3
And the record plays very slowly.
Lets 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 uuhhuuhh.. right when
hes 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.
Chemichal change： a change that alters the composition of the
molecules of a
Substance. new substances with new properties are produced.
Drop.
From now untill your next lesson we want you to study carefully
every section
Of lesson six, and to goback over lesson four.
Practice carefully- and you will be ready for the new techniques
and new
Situations we will cover together in lesson 5.
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