Read the text thoroughly with a dictionary and answer the following questions. Use your knowledge of chemistry or an encyclopedia as well.

Date: 2015-10-07; view: 628.

1. What sugars does the author mean?

2. Why are carbon compounds so important?

3. What was the source of organic chemicals in the past?

4. What chemical did Wohler prepare in the laboratory?

5. What else can Wbhler be credited with?

6. What do you know about petroleum?

7. It's written in the text: "Nowadays, however, we use the term "organic compounds" to mean carbon compounds, there being some exceptions to the rule." What are the exceptions?

6. Find in the text English equivalents to the given Russian words, word combinations and chemical terms:

nouns: виключення, утворення, правило, причина, сировина

verbs: означати, розглядати (уважати), довідатися, перетворювати, з'єднувати(ся), розділити, робити

adjectives: окремий, штучний, істотний, морський

adverbs and prepositions: усередині, деяким чином, просто, безпосередньо, звичайно, трохи (мало), разом, занадто багато

word combinations: не можна не зачудуватися, можна сказати, у цей час

chemical terms: цукор, етиловий спирт, метан, сечовина, вуглець, ланцюжок атомів, вуглеводень

7. Choose a word in the columns (a) or (b) that has nearly the same meaning as the italicized word:

(a) (b)

1. to learn to know to find out

2. essential significant fundamental

3. man-made important artificial

4. to consider to think to weigh

5. to convert to study to transform

6. to manufacture to do to produce

7. to join to combine to associate

8. separated divisible isolated

9. directly spontaneously immediately

10. nowadays at present at some time

11. exception elimination deviation

12. reason cause intuition

13. rule law instruction

14. marine naval oceanic