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Grammar work. A Make the passive sentences active.
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A Make the passive sentences active.
1. They are called chlorofluorocarbons.
2. The name is frequently abbreviated to CFC, and a numbering scheme is used to tell how much of each element is in the molecule of the CFC under discussion.
3. These particles are readily washed out of the air by the rain.
4. Those CFC molecules that bind themselves in the stratosphere are subjected to intense ultraviolet radiation from the Sun.
5. The stable layer is disturbed by chemical reaction.
6. Chlorine gas is something spilled in industrial or shipping accidents.
B Choose the appropriate verb to fill in the gaps. Mind the grammar.
build. tell kill know give
1. I want him ……me about the application of this method.
1. People living there don't want this electrical power plant ……
1. The students are said …………..the ecology well.
2. ………the students the necessary knowledge of the lethal chemicals was the main task of the laboratory work.
5. They are expected…….. many trees in the area.
C Choose the correct preposition.
1. The impact … industry … the biosphere is compensated.. the inner resources of nature's self organization.
2. These " green friends" are capable … assimilating various components … industrial pollutants …. the atmosphere.
3. They absorb noxious gases which have a negative effect …the environment and release oxygen … the atmosphere.
4. People in super cities suffer ….. polluted environment: bad water, bad air and noise.
5. Helsinki becomes one … the cities with the largest proportion …CO2 … the air in winter. This must be connected ….. the heating … houses.
Vocabulary work
| A Turn the following verbs into nouns | B Turn the following nouns into adjectives |
| consume | industry |
| eject | nature |
| combust | structure |
| purify | environment |
| vary | physics |
C Match the words with their definitions.
| 1. green house effect | a. the phenomenon by which the Earth's atmosphere traps some of the Sun's heat as it radiates from the Earth's surface. |
| 2. ozone layer | b. the complex of climatic, adaptive and biotic factors that act upon organisms and ecological community and ultimately determine its form and survival. |
| 3. environment | c. a specialist in a branch of science concerned with the interrelationship of organisms and their environment. |
| 4. ecologist | d. a person who works toward protecting the environment from destruction or pollution. |
| 5. environmentalist | e. a region in the upper atmosphere containing a high amount of ozone gas that absorb the Sun's ultraviolet radiation. |