SCIENCE IN EVERYDAY LIFE- class 6- physc

science

1. SCIENCE IN EVERYDAY LIFE

2. SCIENCE

3. GADGETS Think of the electronic devices we use everyday. The phone that we use, the camera that goes with us on every vacation, the TV that we watch for fun all these devices that we use are called gadgets. A gadget is a small electronic machine or device which does something useful. Number of gadgets have changed our lives. They make our life enjoyable. Examples: Laptop Phone , Camera , Pen drive, Speaker Kitchen applications ATM Communications Tools Medicine

4. FOOD MATERIALS What is food? Food is one of the basic needs of our life. Food provides energy. It is usually made by cooking plants or animals. It contains essential nutrients to keep our body healthy. Food can be classified into two types: 1. Raw Food - Raw food is the food that does not have to be cooked to eat. Examples: Fruits, carrot, ground nut seeds. 2. Cooked food - Cooked food is the food that has been cooked to eat. Examples: Rice, vegetable curry, bread.

5. COOKING Do you know how many food items are their that you will not be able to eat without cooking? Cooking is important. It makes food suitable for consumption. BENEFITS OF COOKING Cooking causes many useful changes in food. 1. It makes nutrients ready for digestion. 2. It helps to make food in the desired texture, flavour and taste . 3 It destroys harmful microbes.

6. Baking of Bread, Biscuit and Cake Baking is a method of cooking. We use dry heat to bake. Bread, biscuit and cake are some examples of baked food items.

7. CHANGES AROUND US Change is the transition of a substance from one form to another. We see many changes around us. We see changes like day and night, summer and winter and so on. We also see changes in objects. Growth of a tree, ripening of fruits, falling of leaves are some of the changes taking place around us. You can observe changes in you also. Your height and weight increase, hair and nail grow and you have grown up as a whole compared to last year.

8. CHANGES REVERSABLE CHANGE IRREVERSABLE CHANGE Changes which can be reversed are called reversible changes. If you keep water in the freezer for some time, it is transformed into ice. If it is taken out, it becomes water again. This is a reversible change. Changes which cannot be reversed are called irreversible changes. If you burn a piece of paper it burns and turns into ash. It cannot become paper again. This is an irreversible change.

9. CLASSIFICATIONS OF CHANGES slow and fast reversible and irreversible physical and chemical changes desirable and undesirable natural and man - made

10. Q & A THANK YOU