Lesson 6: The Lecture

Okay, let's begin Compound; a substance composed Of two or more elements Chemically combined In definite proportions by weight Mixtures; 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 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 Zeppelin And Frank Sinatra would go together? Edit, no combinations of music You're about to play a soul, 45 rpm recording But the turntable is set at 33 and a third And the record plays very slowly Let's pick up the tempo a bit, eh? Now, let us imagine That 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, uuh Right, when he's playin' the drum, you know Let him play a couple beats alone, euh Oh, I'm sorry I had the turntable at the wrong speed Aah Listen to this, scratchin', the greatest thing on earth What do you do? What do you do? Toggle, wow, drop Chemical change; a change that alters The composition of the molecules of a substance New substances with new properties are produced Drop From now until your next lesson We want you to study carefully every section Of lesson six and to go back over lesson four Practice carefully, and you will be ready For the new techniques and new situations We will cover together in lesson five