Introduction
When we look around us, we see different types of things such as water, soil, stones, minerals, plants, animals, etc.We also use innumerable object in our daily lives like books, pens, bags, shoes, cars, etc.All these things are of different shapes and sizes.some of them are living like, plants and animals while some are non-living like water, soil etc.some are natural like minerals, air, water, living beings while some are man-made like books, pencils, papers, house, etc.
But what makes up all these substances? The answer is matter. In fact the food we eat, the clothes we wear, the books we read, the chair on which we sit are all made up of different materials. In science the term matter is used for all these materials.
[Matter is anything that has mass, occupies space and can be perceived by our sense.]
That means matter is not only that, which we can see or touch, but also which we can feel, like air.We can not see or touch air but we can feel it.
Water, sugar, alcohol, milk, gold, coal, hydrogen, oxygen, rocks-are all matter because all of them have mass and occupy space.
Does matter of only one kind exist ?
No, there are different kinds of matter. A shirt is made up of cloth, a book is matter made up of paper, a shoe is matter made up of leather etc.
Name two objects made up of each of the following materials :
1.metal, 2.wool, 3.cloth, 4.plastic, 5.leather, 6.glass
MATTER HAS MASS AND OCCUPIES SPACE
This can be proved by the following activity :
Activity 1
Take a glass tumbler.Fill its one third with water. Put a mark on the glass to measure the level of water. Now weight this on a balance.
Take some marbles and put them into the water of glass tumbler one by one. After some time you will notice that water level crosses the mark and rises. This is because the marbles occupy space. Again weight the glass with the marbles.
You will find that the second mass is greater than the first one. This proves that marbles have mass.
This proves that matter has mass and occupies space.
ยฐ The quantity of matter that a body contains is known as its mass.
ยฐ The space occupied by a body is called its volume.
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