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XI. Look through the texts in this unit, find Participle I and Participle II, Infinitives and Gerunds. Define their functions in the sentences.

XII. Act out the following dialogue. A visit to the laboratory

David, a second year student, is showing the laboratory to his friend Mike.

David: Here is our laboratory. Come in, Mike.

Mike: What a variety of smells you have here!

David: No wonder, it is a chemistry laboratory.

(They go up to the bench where an analyst is working.)

Mike: David, what is the analyst doing?

David: He is making hydrogen. Look! He is putting zinc into a flask. Now he is adding sulphuric acid.

Mike: It is very interesting.

David: Now bubbles are forming on the zinc. This is hydrogen.

Mike: Are you involved in making any experiments now?

David: Yes, I am. I am analyzing a specimen of ore and determining the properties of this ore. I’m going to determine the iron content in this piece of ore.

Mike: Are you going to be a scientist?

David: Oh, yes, I am. It’s great to be a scientist.

XIII. Make up a detailed plan of the text “Experiments in a Laboratory”. Speak on each point of your plan, make drawings or write equations on the blackboard if necessary.

XIV. Speak on the topic “Experiments in a Laboratory”. Unit 10 ecology

I. Study the topical vocabulary to avoid any difficulties in understanding the text in exercise III. Consult a dictionary to pronounce the words correctly.

ancestor n – предок

conquer v – завоевывать

decompose v – разлагать, разрушать

discharge n зд. выброс

disturb v – нарушать

environment n – окружающая среда

essential adj – существенный, важный

eternal adj – вечный, неизменный

fertilizer n – удобрение

habitat n – среда обитания

healthy adj – здоровый, жизнеспособный

increasingly adv – по возрастающей, все больше и больше

inexhaustible adj – неисчерпаемый

layer n – слой

noxious adj – вредный

output n – выпуск

poisoning n – отравление

reach v – достигать

resin n зд. смола

sewage n – сточные воды

soil n – почва

standpoint n – точка зрения

suffer v – страдать

upset v – нарушать

wastes n plзд. отходы, выбросы

II. Read the following international words and define their meaning.

Resources, ecology, balance, technology, biosphere, radioactivity, negative effect, factor, industrial, substance, synthetic material, polymer, plastics, pesticide, circulation, bacteria, atmosphere, progress, electricity, automobile, biological, comfort, to diagnose, economic, social, technological process, specialist, personal interest, effective, specific, to integrate.

III. Answer the following questions and express your point of view on the ecological problems (before or after studying the material of the Unit).

  1. What is the term ecology associated with?

  2. What is the definition of ecology?

  3. What are the most acute problems of ecology nowadays?

  4. What are the reasons of ecological problems?

  5. How does a modern society solve ecological problems?