Page 146 - English Class 9

speed of wind gives plenty of information about the
weather. For example, if the speed of the wind is high,
it indicates a storm. With the help of the anemometer,
we can determine the speed of the wind which helps us
to protect ourselves from many natural disasters.

A WIND VANE is also called a weather vane or a
weathercock. This is an instrument that is used for
showing the direction of the wind. It has a similar
feature like the traditional cockerel design with letters
that indicate the points of the compass.

The tool is placed on top of a weather station and gives accurate results
about the direction of the wind which provides a lot of information about
the changes that take place in the weather.

A RAIN GAUGE is an instrument used by meteorologists
for measuring the amount of precipitation occurring over
some time. It is one of the instruments that is used in most
weather stations. The rain gauge must be placed at an open
place without any obstacle. The amount of precipitation
is measured either manually or by an automatic weather
station. The instrument has some limitations. It is
impossible for rain gauge to collect rain during a hurricane.

A. Complete these sentences with the appropriate words from
the text above.

a. Most of the FM …………. broadcast the news at 7:00.

b. The function of a ………….is to convert the change of temperature
into numerical numbers.

c. The Earth is ………. by the atmosphere.

d. The amount of water in the air is called …………….

e. The wind vane is also known as a …………………

140 English 9