VII. Fill in the missing words

Example: 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 10^oC.

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”

XIII. Answer the questions to the text

1. What is oxidation?

2. What does happen during the process of oxidation?

Give the examples of oxidation.

3. Is combustion the example of oxidation?

4. In what form is energy given off during the burning?

5. What are three states of matter?

Characterize three states of matter from the point of view of their molecular structure.

6. What is burning?

7. When is energy released as heat and light?

8. What is radiant heat?

9. How is the heat that radiates back to the solid or liquid called?

10. What is chain reaction?

XIV. The text can be divided into four parts. Where would you divide it? What is each part about?

XV. Find in the text the definitions for the following:

1. Oxidation.

2. Combustion.

3. Burning.

4. Radiation feedback.

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