- •Unit 5. Covalent Bonds
- •1. Fill in the table:
- •3. Read the dialogue and learn how to speak about your past activities. Put the verb in brackets into the Past Continuous. Pay attention to the terms of electricity.
- •4. Put in the missing words, using the words from the table above:
- •5. Put all possible questions to the following statements.
- •6. Put the verb in brackets into the Past Continuous:
- •7. Form nouns from the following verbs using the suffix ‘-ment’ and translate them:
- •8. Choose the appropriate English equivalents.
- •9. Translate the text. Use a dictionary if necessary. To each sentence put different type of question in Present Continuous.
- •10. Read and Translate word-combinations starting from the first component:
- •11. Match the following word-combinations with their translation:
- •12. Match the following sentences with their translation:
- •13. Choose as many words as you can of Ex.1 and form sensible sentences.
- •Specialist Reading.
- •14. Read the text ‘Covalent Bonds’ only once. How much can you remember? Answer these questions without additional reading.
- •If you failed try to answer these questions again after doing the exercises given below the text.
- •15. Read the text again and complete the sentences with the correct ending.
- •16. Study the text and translate the following:
- •17. Match the terms in Table a with their definitions in Table b.
- •Speaking.
- •18. Summarize the text ‘Covalent Bonds’ in 150 words.
- •19. In pairs ask and answer text-based questions.
- •20. Divide into 2 groups. Group 1 translates Extract a and group 2 – extract b of the text “Semiconductors” with a dictionary in writing.
Unit 5. Covalent Bonds
Past Continuous
Affirmative:
I/he/she/it we/you/they |
was were |
testing measuring carrying out etc. |
For example:
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Yesterday Alex and Jim were carrying out the experiment. They began at 11 o’clock and finished at 12.30.
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I was measuring voltage during my physics class.
Compare Past Continuous (I was doing) and Past Simple (I did):
Past Continuous (in the middle of an action)
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Past Simple (complete action)
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1. Fill in the table:
Noun |
Verb |
Adjective |
Adverb |
Translation |
Transcription |
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radiate |
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constructive |
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production |
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pulsate |
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поглощение |
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heat |
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force |
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absorbent |
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n |
state |
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perform |
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bond |
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create |
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количество |
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employ |
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equip |
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n |
piece |
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represent |
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purify |
pure |
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adj |
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примесь |
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relative |
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similar |
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discovery |
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orbit |
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таблица |
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2. Read and translate the following international words:
Nouns (n): crystal, group, helium, radiation, radium, valence, uranium.
Adjectives (adj): central, covalent, cubic, periodic, vertical, economic(al).
Verbs (v): group, radiate, vibrate.