The wheel
Activities
C. Complete the following sentences with words/phrases form the box.There are more words than necessary.
Although the wheel is a very (a) invention, the history of its origin is unknown. Experts guess that the first wheel was developed from a circular object. The early man observed that a huge piece of stone could be rolled easily if it was (b) in shape. Similarly, a heavy tree-trunk is (c) to carry; but it can be rolled away with less effort. Even, a gigantic tree-trunk can be moved easily using other small and round trunks as rollers under it. Thus, early man took advantage of rolling objects and developed the (d) wheel. Apart from its mechanical advantage, a wheel's mobility has contributed (e) to the civilisation.
B. Read the text and answer the following questions.
Human beings have invented many important things so far. They have brought great civilization to the world through these inventions. Do you know which invention is the greatest? It is the wheel'.
A wheel is a circular object. It can rotate around its axis and help easy movement of things across a surface.
The wheels are, in fact, everywhere. They are on our cars, trains, planes, wagons and so on. Besides, they are on most factory and farm equipment. Fans, propellers, turbines are also other types of wheels.
So the wheel is very important. We cannot imagine modern life without wheels. But do we know exactly who made the first wheel?
Questions
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1. The wheel |
is |
a type of wheel. |
|---|---|---|
|
2. A plain wheel |
around its axis. |
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|
3. It |
one of the simplest machines |
|
|
4. A propeller |
wheels on vehicles and machines . |
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helped in rapid progress of civilisation. |
1. The wheel rotates around its axis.
2. A plain wheel is one of the simplest machines.
3. It has wheels on vehicles and machines .
4. A propeller is one of the simplest machines.
E. Have you ever travelled by bus or car? Do you have any experience of what happens if one wheel falls flat. If yes, give a description of your experience. If no, imagine such a situation, and write a paragraph on it.
My Devastating Experience of Travelling by Bus
As I live in Dhaka, I have to travel a lot by bus. Few days back, I was going to my school by bus. Suddenly it crashed with a car coming from the opposite direction. The front side of the bus was severely damaged and the car was damaged at its best. Fortunately, we were saved as the velocity of bus and car were slow. The collision happened because of the error of the judgement. Some people got panicked and started shouting. Traffic clogged up in one place. We got out from the bus and went to our destination by another bus. It was one of the most shocking experiences that I have ever encountered.
C. Write ‘True’ or ‘False’ beside the following sentences.