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III. Read and translate the following words paying attention to theword – building: sequence, sequent, sequentially to suppress, suppression, suppressed to differ, difference, different, differently combustion, combustive, combustible, combustibility to exist, existence, existent convection, convector, convective. IV. Form the adverbs from the adjectives which are used to describe the rate of change: slight - steady - sharp - sudden - fast - V. Match the synonyms: a) remove, prevent, miss, go out, ignite, contain, common, transfer b) die out, avert, have, transmit, escape, conventional, eliminate, burn.
VI. Translate the following sentences paying special attention to the underlined words: 1. The fire broke out in the hotel kitchen. 2. The fire was started by an electrical fault. 3. A huge forest fire is burning out of control in the south of France. 4. Firefighters struggled to control the blaze at a huge chemical plant. 5. People saw flames coming from the engine. 6. Within minutes the whole school was in flames. 7. The ship was ablaze. 8. It took firefighters four hours to put out the fire. 9. They threw sand on the fire to put it out. 10. He managed to extinguish the flames with his coat. 11. Firefighters rescued the children, who were trapped in an upstairs room. VII. Add however or therefore to each pair of sentences Example. Water is normally a liquid. Above 100 oC it becomes steam. Water is normally a liquid. However, above 100 oC it becomes steam. 1. In a solid, each molecule remains in a stable position. It does not remain motionless. 2. In a solid, each molecule remains in a stable position. A solid has stability. 3. A solid normally has stability. Under certain conditions, it corrodes or decomposes. 4. A liquid has a definite shape. It does not have a stable shape. 5. A gas does not have a definite shape or a stable surface. It does not have a stable volume either. 6. A gas has no stability. A gas disperses rapidly into the atmosphere. VIII. Translate the sentences paying attention to the construction of the sentences: 1. He saw the experiment (that was) conducted with the iron. 2. A fire extinguisher is a device (that is) used to extinguish small fires. 3. Let us now consider the pressure (that is) exerted by a fluid. 4. A Bunsen burner is a device (that is) used to provide a source of heat in a chemical laboratory. 5. The gas (that was) produced by the reaction was CO2. 6. The air (that is) heated by the fire will rise to the ceiling. 7. The data (that was) obtained during the three experiments is recorded in Table1.
IX. Change sentences into questions: 1. Before solid fuel will burn, it must be changed to the vapour state. 2. If the vapour mixes with air and is heated to a high temperature, combustion results. 3. The burning rate of a solid fuel depends on its configuration. 4. Flammable liquids release vapour in the same way as solid fuels.
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