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WHAT PROBLEM DOES THE STUDENT HAVE?
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- WHAT DOES THE ADVISOR MEAN WHEN HE SAYS THIS (Advisor) so let me just cut to the chase. 4. LISTEN AGAIN TO PART OF THE CONVERSATION. THEN ANSWER THE
- WHAT DOES THE ADVISOR MEAN WHEN HE SAYS THIS
1. WHAT PROBLEM DOES THE STUDENT HAVE?
2. WHAT IS STATED ABOUT THE COURSES THE STUDENT HAS TAKEN 3. LISTEN AGAIN TO PART OF THE PASSAGE. THEN ANSWER THE QUESTION. (Advisor) I saw what you registered for next semester, and you need to take sociology theory…the second half. (Student) I was going to wait until next semester and take Spanish this time. (Advisor) Normally I like to present options, but I’m afraid you haven’t got many, so let me just cut to the chase. In order to graduate on time, you pretty much have to take Sociology Theory 2 and Research Methods next semester, and pass both of them. WHAT DOES THE ADVISOR MEAN WHEN HE SAYS THIS? (Advisor) so let me just cut to the chase. 4. LISTEN AGAIN TO PART OF THE CONVERSATION. THEN ANSWER THE QUESTION. LPREP IBT 3 E AudioScript 142 (Advisor) Kelly, make sure you check the requirements online for that major and plan it out. (Student) OK. I’ll look at it and make my plan. (Advisor) I don’t have time to really check up on you, so I’m going to have to trust that you’ll follow through on this without any hand holding. WHAT DOES THE ADVISOR MEAN WHEN HE SAYS THIS: (Advisor) I don’t have time to really check up on you, so I’m going to have to trust that you’ll follow through on this without any hand holding. 5. WHAT IS THE WOMAN PROBABLY GOING TO DO? Page 473 [ mp3 224-225] Questions 6 through 11. Listen to a lecture in a chemistry class. (Professor) OK, so today I’d like to discuss the chapter on carbon in your textbook. We’re going to be having an exam on this information later in the week, so you need to be sure you’ve read the chapter and you take adequate notes today. Now as you know, carbon is a group 14 element, uh…non- metallic, and solid. It plays a significant role in the chemistry of life, and in fact has its own branch of chemistry, Organic Chemistry. But, the main point of the chapter in your book is that carbon is unique because of how many compounds it can form. Incredibly, there are more than seven million compounds that contain carbon. Yes, that’s right, I said more than seven million…there are 7 million carbon compounds now known, and there’re only 100,000 compounds made from all the other elements. This is because the carbon atom attaches quite easily with other carbon atoms and with many other kinds of atoms. Now, if you read the chapter, you should have already become familiar with some of the better-known carbon compounds, such as um…graphite and gasoline, and uh…well, some others. In addition to the graphite and gasoline, the text discusses soap and diamonds. Now, I’m sure it wasn’t a surprise that graphite and gasoline are made from carbon, correct? But it does seem strange that soap and diamonds are also derived from carbon. . . . . Let’s look at graphite first. Graphite is made only of carbon. As you can see in this diagram, it has rings of six carbon atoms each, and two of the carbon atoms are part of each ring. Oh, and, uh, let’s see… an example… graphite is the primary component of the lead in pencils. Now, um, the next carbon compound I want to mention is gasoline. Look at this gasoline molecule. The carbon atoms in this molecule are in a chain rather than in rings, as they were in the graphite molecule. And, unlike the graphite molecule, which was made only of carbon, the gasoline molecule is a compound of carbon and hydrogen. In this diagram, the gasoline molecule is a molecule of octane because it contains a chain of eight carbon atoms, and “octane” means eight. Different types of gasoline molecules each contain a chain of, uh, between five and ten carbon atoms. So, let’s move on to the soap molecule. It might seem strange to think that soap contains carbon, but it does. Now, what about LPREP IBT 3 E AudioScript 143 the soap molecule? I uh, I don’t have a picture of a soap molecule here today, but you need to know that the soap molecule has a long chain of carbon atoms, a much longer chain than the gasoline atom. In fact, soap can have anywhere between five and seven carbon atoms in a chain. Oh, wait. Did I say five to seven? Oh, excuse me. I meant to say fifteen to seventeen. Let me repeat this. A soap molecule has fifteen to seventeen carbon atoms in a chain, not five to seven. Sorry for the confusion. OK. That makes three of the types of carbon molecules we need to review, so there’s only one more. The last example of a carbon molecule is diamond. Here’s the diagram of a diamond molecule. This diamond molecule consists only of carbon, and the carbon atoms are arranged in a very complex pattern. That’s what helps to make diamond harder than any other natural substance. OK. I think you’ve got all the necessary information on carbon and a few of the many compounds that’re formed from it. In graphite, the carbon is in rings, while in octane and soap, it is in long chains. And in diamond, it is in a very complex pattern. Both graphite and diamond molecules are formed solely from carbon, while gasoline and soap are compounds of carbon atoms and other types of atoms. So, as long as you took notes today, and you look over the chapter, you’ll do fine on our upcoming exam. See you all at our next class, the day after tomorrow. Download 0.63 Mb. Do'stlaringiz bilan baham: |
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