Is it possible to make more that
one object from a given
given material ?
explain at least two examples.
Answers
Answer:
Let us collect as many objects as possible, from around us. Each of us could get some everyday objects from home and we could also collect some objects from the classroom or from outside the school. What will we have in our collection? Chalk, pencil, notebook, rubber, duster, a hammer, nail, soap, spoke of a wheel, bat, matchbox, salt, potato! We can also list objects that we can think of, but, cannot bring to the classroom. For example, wall, trees, doors, tractor, road.
Separate all objects from this collection that are made from paper or wood. This way we have divided all objects into two groups. One group has the objects that are made from paper or wood while the other group has the objects that are not made of these materials. Similarly, we could separate the things that are used for preparing food.
Let us be a little more systematic. List all objects collected, in Table 4.1. Try to identify the materials that each one is made of. It would be fun to make this a large table – collecting information about as many objects as possible. It may seem difficult to find out the materials out of which some of these objects are made. In such cases, discuss with your friends, teacher and parents to identify the materials.
Table 4.1 Objects and materials they are made of
Objects Materials they are made of
Plate (thali) Steel,glass,plastics(any other)
Pen Plastics , metal
Activity 2
Boojho wants to know, whether we found some materials that were used for making more than one type of and object.
Table 4.2 lists some common materials. You can also add more materials in Column 1 that are known to you. Now,try and think of everyday objects you know, that are made mainly of these materials, and list them in Column 2
Table 4.2 Different types of objects that are made from the same material
Materials Objects of these materials
Wood Chair, table, plough, bullock cart and its wheels, ...
Paper Books, notebooks, newspaper, toys, calendars,...
Leather
Plastic
Cotton
What do we find from these tables? First, we grouped objects in many different ways. We then found that objects around us are made of different materials. At times, an object is made of a single material. An object could also be made of many materials. And then again, one material could be used for making many different objects. What decides which material should be used for making any given object? It seems that we need to know more about different materials.