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;

1. 1. It helps in manufacturing of medicine to cure sick people.

   2. It helps in  manufacturing of cooking oil and sugar in the food industry.

   3. It helps in manufacturing of detergents like Omo, Foma etc for cleaning purposes.

   4. It helps in manufacturing of fertilizers for agriculture activity.

   5. It helps in manufacturing of chemical substances which kill weeds and pests.

   6. It helps in manufacturing of fuel i.e. petrol diesel etc.

   7. It helps in manufacturing of shoes and clothes.
   8. We study chemistry in order to start career. For example To be doctors, pharmacists , physicists etc.
   9. We study chemistry in order to answer question about natural things i.e .why does iron rust?

                

         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)..............................