Презентация "Measurements".

MEASUREMENTS

Ex.1. Give the adjective following the example. Read the words. Pay attention to the pronunciation.

length –

width –

height –

depth –

thickness –

strength –

weight –

long

wide

high

deep

thick

strong

weighted

Ex. 2. Fill in the missing letters in the following words.

len … h

wi …th

d … th,

w … ght

stre … th

hi …

d … p

wei …

w … de

g

d

ep

ei

ng

gh

ee

ghted

i

Ex. 3. Choose one word in each group.

1. This car is (long, longer, length) than that one.

2. Its (weigh, weight, width) is more than 50 kilograms.

3. This ladder is as (high, height, higher) as that one.

4. The pool is very (depth, deeper, deep).

5. It’s very thick wall. Its (thick, thicker, thickness) is 38 cm.

Ex. 4. Read the text below and say if you have learnt some units of measurement in it you didn’t know before.

The metric system is adopted as the common system of weights and measures by the majority of countries, and by all countries as the system used in scientific work.

Weights and measurements. In the English-speaking world, the everyday units of linear measurement were traditionally the inch, foot, yard and mile. In Britain units of weight (ounces, pounds and tons) are now also derived from the metric standards – kilogram.

Length. The meter was defined in 1983 as the length of the path travelled by light in a vacuum during the time interval of 1/299,792,458 of a second.

Time. For centuries, time has been universally measured in terms of the rotation of the earth. The second, the basic unit of time, was defined as 1/86,400 of one complete rotation of the earth on its axis in relation to the sun.

Some units are too large for ordinary use and others are too small. To compensate, the prefixes developed for the metric system have been borrowed and expanded. Examples are millimeter (mm), kilometer/hour (km/h), megawatt (MW). The prefixes hector, deka, deci and centi are usually used with meter to express areas and volumes.

Ex. 5. Correct the wrong information in the following statements.

a) The metric system is adopted as the system used in scientific work by the majority of countries.

b) In the English-speaking world, the everyday units of linear measurement were traditionally a meter and a kilometer.

c) For centuries, time has been universally measured in terms of the rotation of the moon.

d) To make the metric system more convenient some suffixes were developed.

Ex. 6. Learn the following units and fill in the gaps in the sentences below.

Units of time

Units of length

12 inches = 1 foot = 30.5 cm

60 seconds = 1 minute

60 minutes = 1 hour

3 feet = 1 yard = 91 cm

24 hours = 1 day

1760 yards = 1 mile = 1609 meters

7 day = 1 week

1 inch = 2.54 cm

52 weeks = 1 year

1 meter = 39.37 inches

365 days = 1 year

Units of area

1 square meter = 10,000 square centimeters

Units of weight

16 ounces (oz.) = 1 pound (lb.)

1 kilogram = 2.2 lbs

Units of volume

1 cubic meter = 1,000,000 cubic centimeters

1. The speed of the car is 20 km per hour which is equal to … meters per second.

2. The length of the wrench is 20 centimeters which is equal to … meters.

3. The weight of the wheel is 15 kilograms which is equal to … pounds.

4. The volume of the engine is 2,000 cubic centimeters which is equal to … cubic meters.

5. The length of the car is 3.2 meters which is equal to … inches.

6. The warranty for this equipment is 2 years which is equal to … weeks.

7. The load capacity of the dump truck is 8 tons which is equal to … kilograms.