CBSE Class 6 Science Sorting Of Materials Notes

CBSE Class 6 Science - Sorting of Materials Learning the important concepts is very important for every student to get better marks in examinations. The concepts should be clear which will help in faster learning. The attached concepts made as per NCERT and CBSE pattern will help the student to understand the chapter and score better marks in the examinations. 

Ans. Classification of materials into various groups on the basis of similarities and dissimilarities in properties is known as sorting of materials.

2. What is the need to classify materials?

Ans. Classification of materials is done to make the study of objects easier. Also, classification makes it easier to locate objects.

3. How are hard materials different from soft materials? Give two examples of each.

Ans. Hard materials: Those materials which cannot be easily scratched or compressed are called hard materials.

Example: Wood, stone, glass etc.

Soft materials: Those materials which can be easily scratched or compressed are called soft materials. Example: wool, foam, butter etc.

4. Classify the following materials on the basis of their solubility in water:

Material                                                    Solubility in water

Milk                                                            Soluble

Alcohol                                                       Soluble

Sand                                                          Insoluble

Copper sulphate                                          Soluble

Wax                                                           Insoluble

Chalk powder                                              Insoluble

5. What is the importance of oxygen dissolved in water?

Ans. Oxygen gas dissolved in water is used by the aquatic plants and animals for respiration.

6. Why does water play an important role in the functioning of our body?

Ans. Water plays an important role in the functioning of our body as it can dissolve a large number of substances in it.

7. Name any two liquids which are miscible with water and two which are insoluble in water.

Ans. Liquids miscible with water: Vinegar, lemon juice

Liquids immiscible with water: petrol, groundnut oil

8. Give one word for the following:

a) Shine observed on the surface of metal.

b) Substances through which light cannot pass.

c) Substances which do not dissolve in other substance.

9. Name two materials which float on water and two which sink in water.

Ans.

Materials which float on water:     Dry leaves, oil

Materials which sink in water:       stone, chalk

10. How are transparent objects different from translucent objects?

Ans. Transparent materials: The materials through which we can see clearly are known as transparent materials. Example: glass, air etc.

Translucent materials: The materials through which we cannot see clearly are known as translucent materials. Example: butter paper, ground glass, frosted glass etc.

11. Name two gases which dissolve in water to some extent.

Ans. Oxygen, carbon dioxide

12.Fill in the blanks:

a) A feather ___________ on the surface of water.

b) ________________ cannot be compressed easily.

c) Coconut oil ____________ on the surface of water.

d) Common salt is ____________ in water.

e) Materials usually lose _____________ and appear dull if kept exposed to air and moisture for a long time.

f) Water contains ___________ oxygen that supports life under water.

13. State one property of metals which is used for making jewellery.

Ans. Lusture

14. State true or false:

a) Bark of tree is rough.

Ans. True

b) Wood is a transparent material.

Ans. False

c) Carbon dioxide is insoluble in water.

Ans. False

d) Coconut oil is immiscible in water.

Ans. True

15. Find the odd one out from the following :

Aluminium, iron, copper, silver, sand

Ans. Sand as it is not lusturous.

Please click the link below to download CBSE Class 6 Science - Sorting of Materials