INTRODUCTION TO CHEMISTRY
What is chemistry?
Chemistry is a branch of science which deals with composition, decomposition and properties of matter.
Or
It is a branch of science which deals with composition, properties and changes of matter.
Note: In chemistry we study how different substances combine with other substances to form new substances.
-People who study chemistry are called chemists
– Material objects made by application of chemistry,are fertilizers,perticedes,detergents etc
What is the importance of chemistry ?
Chemistry is important for our lives and development due to;
- It helps in manufacturing of medicine to cure sick people.
- It helps in manufacturing of cooking oil and sugar in the food industry.
- It helps in manufacturing of detergents like Omo, Foma etc for cleaning purposes.
- It helps in manufacturing of fertilizers for agriculture activity.
- It helps in manufacturing of chemical substances which kill weeds and pests.
- It helps in manufacturing of fuel i.e. petrol diesel etc.
- It helps in manufacturing of shoes and clothes.
- We study chemistry in order to start career. For example To be doctors, pharmacists , physicists etc.
- We study chemistry in order to answer question about natural things i.e .why does iron rust?
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REVIEW EXERCISE
1. Define the following ,
(i) Chemistry
(ii) Laboratory
2. People who study chemistry are known as ……………….
3. Mention different material / objects made by application of chemistry.
(i)…………………………
(ii)………………………..
(iii)………………………..
(iv)………………………..
(v)…………………………….
4. Mention the importance of chemistry in your daily life.
(i)…………………………..
(ii)………………………….
(iii)………………………….
(iv)…………………………
(v)…………………………
