You may look at your dictionary while doing the exercises.
Things Around UsThere are many things around us. They can be different in size, shape, color, smell or texture. They can also be made from different materials. Things are different because they have different properties.
Things are similar in some ways too. Let's take a look at how things can be similar.
Things have weightThe weight of a book tells us how heavy that book is. Every thing, be it big or small, has weight. We often use 'heavy' or 'light' to describe the weight of something.
Some things, such as a pencil or a feather, are light. We can lift them easily. Some things, such as a cupboard or a desk, are heavy. We cannot lift them easily.
It is easy to lift an empty pail, but when the pail is full of water, it is harder to lift it. This shows that water has weight.
What about air? Does it have weight? Air, like water, and all the things around us, has weight too.
Things occupy space
The books occupy half the space in the cupboard. There is still space for some more books.
The glass is filled with colored water. The water occupies all the space in the glass. What do you think will happen if you put a few pieces of ice into the glass of water?
Air occupies space too. When we blow air into a balloon, the air fills the space inside the balloon.
In science, anything that has weight and occupies space is called matter.