This document discusses various topics related to science in everyday life including gadgets, food materials, cooking, and changes. It provides the following key points: 1. Gadgets are small electronic devices like phones, cameras, and TVs that have changed our lives by making them more enjoyable. Examples include laptops, kitchen appliances, and communication tools. 2. Food can be raw or cooked, with raw foods not requiring cooking and cooked foods being prepared through methods like cooking. Cooking makes nutrients available for digestion and allows control of texture, flavor, and taste while destroying harmful microbes. 3. Baking is a cooking method using dry heat to make items like bread, biscuits, and cake

1. SCIENCE IN EVERYDAY
LIFE

2. SCIENCE

4. 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

5. 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.

6. 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.

7. 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.

8. 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.

9. 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.

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

11. Q & A
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