��science and technique have changed human life during the last hundred and fifty years more than it had been since man took to agriculture,and the changes continue at an increasing speed.

It is paradox to say that the history of science begins with its prehistory.

The earliest to understand and control nature took the form of magic but more important were the discoveries which began the long and difficult task of emancipating man from dependence on nature and his muscular energy.

The first technical advances were made in the Nile Vallyy where the development of measurement,the first step of geometrical theory was worked out.

We can not know the invertors of the wheel or the invertor of the concept of abstract numbers without neither reckoning nor the mathematical sciences would have been possible.But we know that prehistoric man contributed to the arts which were the forerunners of engineering.

never before in history have there been such rapid changes in our way of life as at the present moment.Scientists have been using what is called "a scientific method" to make new discoveries.Our homes.our food and clothing,our sources of power, our means of travel and communications,out health facilities as well as our amusements,hobbies and other leisure time activities,all are being affected by those discoveries.

Thousands of scientists have been using the most morn equipment to study the atmosphere.Small laboratories,packed with scientific intruments ,are being rocketed into space as earth satellittites.

Science affects our daily living.It is with us from the time we get up in the morning until we go to bed at night.

Our study of science opens a new whole world for us.We all want to know the why of things.We want to know what they are made of,and why they act the way they tell if it will be raining tomorrow where you live? How does an airplane get off the ground? What is the difference between stainless steel and ordinary steel? How does a radio pick up a broadcast?

The study of science help us our outlook.Years ago , people knew nothing of the world outside the local region where they livees.They seldom travelled far from home.But now science has made such great progress that we can look to distant horizons.We are even getting interested in the distant bodies of the Universe.

Science is the study of all materials and their behavior under different conditions.

khoa h�c v� k� thu�t c� ��c thay �i con ng��i cu�c s�ng trong th�i gian trm nm tr��c v� nm m��i nm g�n �y s� thay �i � nhi�u h�n

n� b�t �u t�

n�ng nghi�p,v� s� thay �i ti�p t�c tng nhanh.

� l� m�t Ngh�ch l� N�u n�i r�ng L�ch s� (C�a) Khoa h�c B�t �u v�i

ti�n s� c�a n�.

S�m nh�t � hi�u v� ki�m so�t Thi�n nhi�n C�m l�y M�u (d�ng) (C�a)

ma thu�t m� quan tr�ng h�n kh�m ph� m� b�t �u d�i

v� nhi�m v� kh� (c�a) gi�i ph�ng ng��i �n �ng �n t� ph� thu�c tr�n thi�n nhi�n

v� s�i c� (c�a) anh �y nng l��ng.

K� thu�t �u ti�n ti�n t�i ��c l�m � Nile Vallyy n�i m� s�

ph�t tri�n (c�a) ph�p o l��ng , b��c �u ti�n (c�a) l� thuy�t thu�c h�nh h�c

ti�n tri�n.

Ch�ng t�i kh�ng th� Bi�t ng��i ph�t minh B�nh xe Hay ph�t ch� ra

kh�i ni�m (c�a) s� tr�u t��ng m� kh�ng c� khoa h�c to�n h�c � l� c� th� x�y ra. Nh�ng ch�ng ta bi�t r�ng nh�ng ng��i ti�n s� � �ng g�p nh�ng k� thu�t �y l� ti�n th�n c�a k� thu�t c� kh�.

ch�a bao gi� tr��c �y trong l�ch s� � � s� thay �i nhanh

cu�c s�ng nh� ng�y nay. Cac nh� khoa h�c � s� d�ng

i�u m� ��c g�i " ph��ng ph�p khoa h�c " � c� nh�ng kh�m ph� m�i. Nh� c�a ch�ng ta,th�c n v� qu�n �o,ngu�n nng l��ng, nh�ng ph��ng ti�n (c�a) ch�ng ta

du l�ch v� nh�ng ph��ng ti�n truy�n th�ng, ngo�i s�c kh�e cing nh� c�a ch�ng ta

gi�i tr�, s� th�ch v� th�i gian th� gi� nh�n r�i kh�c ho�t �ng,all ang l�

��c �nh h��ng b�i nh�ng kh�m ph�.