NCERT Solutions for Class 6 Science - Sorting Materials into Groups

The things, which we all use in our daily life are made up of different types of materials. All these materials have mass, shape and are classified based on many criteria, including their physical states, properties of materials, etc.

Let‘s have a look at the questions and answers for a better understanding.

Exercises

Q1. Name five objects which can be made from wood.
Ans: Table, Chair, Bed, Doors, Bullock cart, etc.

Q2. Select those objects from the following which shine: Glass bowl, plastic toy, steel spoon, cotton shirt
Ans: Glass bowl and steel spoon.

Glass bowl

Steel Spoon

Q3. 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

Ans:

Q4. State whether the statements given below are True or False.
(i) Stone is transparent, while glass is opaque.
Ans: False

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(ii) A notebook has lustre while an eraser does not.
Ans: False 

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(iii) Chalk dissolves in water.
Ans: False

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(iv) A piece of wood floats on water.
Ans: True 

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(v) Sugar does not dissolve in water.
Ans: False 

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(vi) Oil mixes with water.
Ans: False

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(vii) Sand settles down in water.
Ans: True 

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(viii) Vinegar dissolves in water.
Ans: True

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Q5. 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
Ans: Round shaped: Basketball, orange, globe, apple, and earthen pitcher 
Other shapes: Water and sugar.

(b) Eatables and non-eatables
Ans: Eatables: Water, orange, sugar, and apple 
Noneatables: Basketball, globe, and earthen pitcher.

Q6. List all items known to you that float on water. Check and see if they will float on an oil or kerosene.
Ans: Here is a list of things that can float on water and whether they can also float on oil or kerosene:

• Paper – Floats on water, oil, and kerosene.
• Plastic – Floats on water, oil, and kerosene.
• Thermocol (Styrofoam) – Floats on water, oil, and kerosene.
• Wax – Floats on water and oil, but sinks in kerosene.
• Balloon – When filled with air, it floats on water, oil, and kerosene.

Other things that can float on water:

• Ice, wood, sponge, petrol, acetone, some gases, polystyrene, and ships.

Note: Things that are lighter than water or oil will float. However, some items, like certain types of wood, may float on water but sink in kerosene because they are heavier than kerosene but lighter than water.

Q7. Find the odd one out from the following:

(a) Chair, Bed, Table, Baby, Cupboard
Ans: Baby: Rest others are made up of wood and are non–living things.

(b) Rose, Jasmine, Boat, Marigold, Lotus
Ans: Boat: Rest others are flowers.

(c) Aluminium, Iron, Copper, Silver, Sand
Ans: Sand: Rest others are metals.

(d) Sugar, Salt, Sand, Copper sulfate
Ans: Sand: Rest others are in crystal forms.