1.8. Unscramble the words

Oil and natural gas are ________________(raylulant)¹ occurring ________________(ieahclcms)² that are made up of just two elements -- carbon and hydrogen. The class of chemicals based on carbon and hydrogen are called _____________________(aboorndhycrs)³.

The simplest hydrocarbon, ______________(hnatmee)⁴, is made up of one carbon atom and four hydrogen __________(omtas)⁵. Other hydrocarbons like __________ (acoten)⁶ and octadecane have more ____________________(ipdlmoteacc)⁷ structures. Plastics are made of ________________(cesmleulo)⁸ called _______________(mpesroyl)⁹ that are very long ____________(sinach)¹⁰ of hydrocarbons.

1.9. Arrange the words in the correct order

1. of • up • one • four • and • methane, • atom • carbon • is • simplest • made • hydrocarbon, • The • hydrogen • atoms.

The

2. that • called • chains • long • made • Plastics • of • molecules • are • are • very • of • polymers • hydrocarbons.

Plastics

3. Formed? • Oil • Natural • Gas • How • Are

How

4. More • produced • lighter • heat • oil.

More

5. the • migrated • the • and • way • and • gas • to • escaped. • oil • surface • all • Some • natural

Some

6. and • In • easy • were • was • find. • reserves • the • to • past, • low • demand

In

7. exploration • of • challenging • earth. • places • Today, • oil • some • place • takes • on • in • most • the

Today,

8. fact, • depended • on • their • supplies. • the • first • oil • surface • for • of • seepage • In • users

In

9. now, • gas • buried • seams • from. • We • produce • natural • coal

We

10. they, • the • died • of •.they • When • sank • sea • bottom • to • the

When

1.10. Insert the correct auxiliary verbs

Oil and natural gas naturally occurring chemicals that ________________¹⁾ made up of just two elements – carbon and hydrogen. Plastics ________________²⁾ made of molecules called polymers that are very long chains of hydrocarbons. They absorbed energy from the sun, which _________________³⁾ stored as carbon molecules in their bodies. Other oil and natural gas deposits migrated until they _________________⁴⁾ caught under impermeable layers of rock or clay where they _________________⁵⁾ trapped. Oil and natural gas reserves _________________⁶⁾ found in many parts of the world. However, as demand ________________⁷⁾ increased, all the easy-to-find oil ________________⁸⁾ been used. We ________________⁹⁾n’t have to worry about running out of oil or natural gas any time soon. The oil and natural gas industry ________________¹⁰⁾ also investing in alternative energy.

1.11. Find at least 12 hidden words, please

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