Science and Elementary Technology

7.1. Introduction 

Look at the picture

What do you see in the picture?

7.2. Types of Wastes 

7.2.1. Decomposing wastes 

Look at the picture

• What do you see in picture a, b, c?

7.2.2. Non decomposing wastes 

 Look at the picture

          

                     What do you see in the picture?

7.2.3. Toxic wastes 

Look at the picture

                   What do you see in the picture?

7.3. Ways of waste management

 Look at the picture

             • What is the person doing?
7.4. Ways of cleaning a home and its surrounding
Look at the picture


                    • What are the children doing?

Types of wastes are:
• Wastes that can decompose
• Wastes that can’t decompose
• Toxic wastes