Chapter 4: Sorting of materials into groups (Solutions)
Posted on : 18-02-2019 Posted by : Admin

Link to Notes on this topic

1. Name five objects which can be made from wood.

Answer:

1. Cot
2. Tables
3. Chairs
4. Doors
5. Windows

2. Select those objects from the following which shine:

(Glass bowl, plastic toy, steel spoon, cotton shirt)

Answer: The objects which shine from the above given are Glass bowl and steel spoon.

3. Match the objects given below with the materials from which they could be made. Remember, an object could be made from more than one material and a given material could be used for making many objects.

Answer: Books can be made from Paper, Tumbler is made from glass, Chair is made up of wood, Toys are made from plastic and shoes are made up of leather.

4. State whether the statements given below are True or False.

1. Stone is transparent, while glass is opaque. (False)
2. A notebook has luster while eraser does not. (False)
3. Chalk dissolves in water. (False)
4. A piece of wood floats on water. (True)
5. Sugar does not dissolve in water. (False)
6. Oil mixes with water. (False)
7. Sand settles down in water. (True)
8. Vinegar dissolves in water. (True)

5. Given below are the names of some objects and materials. (Water, basketball, orange, sugar, globe, apple and earthen pitcher)

Group them as:

a) Round shaped and other shapes

b) Eatables and non-eatables

Answer:

(a) Round shaped (Basketball, Orange, Globe, apple, earthen pitcher) and other shapes (water, Sugar)

(b) Eatables (Orange, water, sugar, apple) and non-eatables (earthen pitcher, basketball, globe)?

6. List all items known to you that float on water. Check and see if they will float on an oil or kerosene.

Answer: The items which float on water are

1. Plastic bottle
2. Piece of paper s
3. Piece of sponge
4. Piece of thermocol
5. Wood
6. Bamboo
7. Plastic ball
8. Cork

However, none of these items floats on oil or kerosene.

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