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Carpathian mountains [ ], Europe [ ]; Rumania [ ]; Austria [ ]; France [ ]; Italy [ ].

acetylene

butane

carbon

chlorine

ethane

hexane

hydrogen

methane ,

octane

propane

pentane

per cent

3. :

accumulate

approximately ,

boiling point

borehole

consist of

decomposition ,

deposit ,

distinct ,

derivative

extraction ,

fuel ,

inflammable ,

limestone

liquid

natural gas

network

occur

obtain

pressure

porous bed

rush .

source

sandstone

volume

 

4. :

1) occur 1) 2) deposit 2)

3) animal and vegetable remains 3)

4) source 4) ,

5) penetrate 5)

6) under great pressure 6)

7) borehole 7)

8) inflammable 8)

9) liquid and solid fuels 9)

10) extraction 10)

5. :

animal and vegetable remains; under great pressure; several boreholes; network of pipelines; low boiling point; 85 per cent; distinct odour; a great amount of heat; numerous new sources; to obtain new materials; over a period of many centuries; over long distances; inflammable gas.

6. - :

natural deposit, separate deposit, porous beds, long distance, gigantic network, typical natural gas, gaseous fuel, raw material, chemical technologist, extraction of oil, reserves of natural gas.

 

7. , -, :

pore-porosity-porous; collect-collection-collective; approximate-approximately-approximation; chemist-chemistry-chemical; gas-gaseous-gasify-gasification; derive-derivative-derivable; extract-extraction-extractive; utilize-utilization; numerous-numerously; intense-intensification-intensify-intensity-intensive; penetrate-penetration.

 

8. volume (volume ; ).

1.Our university has a library of many volumes of Russian and foreign scientific books and journals. 2. A great volume of gas penetrates into porous beds of sand, sandstone and limestone. 3. As is known, for volume of chemical production this plant is one of the leading ones in our country.

9. . , :

a few

few

a little

little

1. We have little information of this discovery. 2. We must add a little water to make this substance melt. 3. Scientists opened a few new sources of gas in Europe.
4. There are few uses of natural gas in industry. 5. A few years ago we utilized this device in our laboratory. 6. As I had little time I could not get reliable information about this deposit of gas. 7. Little of natural gas we may use chemically. 8. Butane, pentane, hexane, and a few other gases may also be present.

 





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