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II Read and translate the following text: english system of units

The English System has its roots in the Roman system, which used as a base the number twelve. Also from the Romans emanated the names of certain English metrical units such as the inch. The English System developed progressively, and in 19th century the English metrical system was established in various parts of the world, including America. At the heart of the English system of Units is a short list of base units:

Units of Weight

The pound (lb) is the basic unit of weight which is proportional to mass. Within the English units of measurement there are three different systems of weights. In the avoirdupois system, the most widely used of the three, the pound is divided into 16 ounces and the ounce into 16 drams. The ton, used to measure large masses, is equal to 2,000 lb. The troy system is used only for precious metals. The troy pound is divided into 12 ounces and the troy ounce into 20 pennyweights or 480 grains. The troy pound is thus 5,760 grains. The grain is also a unit in the avoirdupois system, 1 avoirdupois pound being 7,000 grains, so that the troy pound is 5,760/7,000 of an avoirdupois pound. Apothecaries' weights are based on troy weights.

Units of Length and Area

The basic unit of length is the yard. Fractions of the yard are the inch and the foot and commonly used multiples are the rod, the furlong and the mile. The acre, equal to 4,840 square yards or 160 square rods, is used for measuring land area.

Units of Liquid Measure

For liquid measure or liquid capacity the basic unit is the gallon. Gallon is divided into 4 quarts, 8 pints, or 32 gills. The U.S. gallon, or wine gallon, is 231 cubic inches. The British imperial gallon is the volume of 10 lb of pure water at 62°F and is equal to 277.42 cu in. The British units of liquid capacity are thus about 20% larger than the corresponding American units.

Units of Dry Measure

For dry measure or dry capacity, the basic unit is the bushel. Bushel is divided into 4 pecks, 32 dry quarts, or 64 dry pints. The U.S. bushel is 2,150.42 cu in. and is about 3% smaller than the British imperial bushel with a similar difference existing between the U.S. and British subdivisions. The barrel is a unit for measuring the capacity of larger quantities and has various legal definitions depending on the quantity being measured.

Differences between American and British Systems

Many American units of weights and measures are based on units in use in Great Britain before 1824, when the British Imperial System was established. Since 1893, the U.S. yard and pound and all other units derived from them have been defined in terms of the metric units of length and mass, the meter and the kilogram. Thus, there is no longer any direct relationship between American units and British units of the same name. In 1959 an international agreement was reached among English-speaking nations to use the same metric equivalents for the yard and pound for purposes of science and technology.

The English units of measurement have many drawbacks: the complexity of converting from one unit to another, the differences between American and British units, the use of the same name for different units, and the existence of three different systems of weights (avoirdupois, troy, and apothecaries'). Because of these disadvantages and because of the wide use of the much simpler metric system in most other parts of the world, there have been proposals to do away with the U.S. Customary System and replace it with the metric system.

III Answer the questions:

1.When did the English system appear?

2. What is the basic unit of weight?

3. What is the basic unit of length?

4. What drawbacks does the English system of units have?

5. What are the differences between American and British Systems?

IV Complete the sentences:

1. Many American units of weights and measures… on units in use in Great Britain before 1824.

2. The English units of measurement have many….

3. The… has its roots in the Roman system.

4. For dry measure or dry …, the basic unit is the…

5. The… is the basic unit of weight which is proportional to mass.

V Find the English equivalents to the words:

Недолік, конвертувати, звична система, дорогоцінні метали, походити, розширятися, аптека, кубічний дюйм, об’єм.

VI Match the English words with their Ukrainian equivalents:

1. fraction a. дорогоцінні метали

2. long ton b. кварта

3. disadvantage c.недолік

4. apothecary d. велика тонна

5. unit of measurement e.тяжкість

6. to convert f. аптека

7. complexity g. конвертувати

8. to emanate h частина

9.quart i. походити

10.precious metals j.одиниця вимірювання

VII True or false statements:

1. The basic unit of length is the yard.

2. The English System has its roots in the Greek system.

3. The pound is the basic unit of weight which is proportional to mass.

4. The troy system is used not only for precious metals.

5. The English units of measurement have no drawbacks.

VIII Translate into English:

1.Англійська система вимірювання сягає коренями Римської системи.

2.Одним з основних недоліків Англійської системи вимірювання є складність конвертування.

3.Основною одиницею довжини є ярд.

4.Фунт-основна одиниця ваги, яка є пропорційна масі.

5. Така одиниця вимірювання як барель використовується для вимірювання місткості.

IX Make up sentences with the terms:

Customary system, yard, The English System, drawbacks, complexity of converting, Apothecaries' weights, avoirdupois, troy, precious metals, American gallon.

X Speak on the topic using the following words and word-combinations:

The Roman system, roots, pound, English units, yard, American and British units, fractions of the yard, the survey foot, drawbacks, three different systems of weights, dry capacity, base units, English-speaking nations, differences, the older definition, the corresponding foot, the complexity of converting, pure water.

TEXT B