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VII. Fill in the missing wordsExample: The output unit of a computer prints out data. The output unit supplies a printout of data. 1. The transmitter has broken down. There has been … in the transmitter. 2. Pressure in the container built up suddenly. There was … of pressure in the container. (use a hyphen) 3. A computer feeds data back to the operator. A computer provides the operator with …. 4. Nobody knows what will come out of the experiment. Nobody knows what … of the experiments will be. 5. The pipe at the bottom of the tank lets the water out. There is … pipe at the bottom of the tank.
VIII. Match the equivalents: a) to reduce, to release, to extinguish, loosely, consumption, residue, to burn b) to set free, to make smaller, not tight, the using of materials, to be on fire, to stop a fire burning, what is left.
IX. Choose the correct word and translate the sentences: producing determining produced including combines destroyed 1. Combustion or burning is a chemical reaction in which a substance … with oxygen … heat, light and flame. 2. Flame is a glowing mass of gas … during combustion. 3. Chemical reactions - … combustion – occur twice as fast if the temperature rise by 10oC. 4. There are several types of apparatus for … the flash point of material. 5. Property … by fire is a total economic loss. X. Fill in the blanks: 1. The rate of expansion in gases, liquids and solids …. a) is the same b) doesn’t differ c) differes 2. The rate of expansion in gases is … in liquids. a) greater than b) less than c) the same as 3. … show the greatest expansion on heating. a) liquids b) solids c) gases 4. The rate of expansions in … is the slowest. a) gases b) liquids c) solids 5. … show the least expansion on heating. a) solids b) gases c) liquids
XI. Choose the correct word and translate the sentences: 1. When a fuel … the energy in it is released as heat. a) is burned b) burned c) burning 2. The rays … from a single point. a) radiates b) radiating c) radiate 3. The sum … heat and light. a) radiate b) radiates c) is radiated 4. Small cars usually … a low fuel consuption. a) have b) has c) having 5. After a reaction a residue of carbon …. a) left b) leaves c) was left XII. Read and translate into Russian the text “Chemistry of Fire” Дата добавления: 2015-09-18 | Просмотры: 986 | Нарушение авторских прав |