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5. Why oil from one area is different from that found in
another?
6. In what soft rocks does the oil accumulate?
7. What caused the transformation of earth’s uneasy surface?
8. Where did the partly totted animal trap?
9. In what way was the coal formed?
10. Where can we use the carbon?

Exercise 2. Say whether the statement is correct
1. Carbon, the main element of crude oil runs our cars,
trucks, buses and boats.
2. Other petroleum products called petrochemicals are used
to make paints, cleaner, waxes.
3. Crude oil is a black, heavy liquid made up almost entirely
of two elements: hydrogen and carbon.
4. Carbon is a liquid which we know best in as charcoal or
the graphite in lead pencils.
5. Petroleum or crude oil is a liquid which is formed when
hydrogen and carbon are combined in the right proportion,
together with atoms of other elements.
6. Oil from one area is often quite different from that found
in another.
7. Some crude oil contains gasoline, while another sort is
rich in lubricants.
8. One type of oil has gas base another wax or paraffin bases.
9. The rotted animals and plants trapped between the layers
of stone were changed by erosion and weathering.
10. The oil was forced by enormous pressure into the tiny
pores of soft rock like sandstone and limestone.

Exercise 3. Underline the correct them
1. The oil is smelly black ….which forms greasy puddles on
the garage gloor:
a) solid

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