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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.
NCERT Solutions for Class 6 Science - Sorting Materials into Groups


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

Glass bowlGlass bowl

Steel SpoonSteel 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

NCERT Solutions for Class 6 Science - Sorting Materials into Groups

Ans:

NCERT Solutions for Class 6 Science - Sorting Materials into Groups


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

NCERT Solutions for Class 6 Science - Sorting Materials into Groups  View Answer

Stone is generally opaque, meaning light cannot pass through it. Glass, on the other hand, is transparent and allows light to pass through.

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

NCERT Solutions for Class 6 Science - Sorting Materials into Groups  View Answer

A notebook is made of paper, which has no shine or lustre. Lustre refers to a shiny surface, which most erasers and notebooks do not have.

(iii) Chalk dissolves in water.
Ans: False

NCERT Solutions for Class 6 Science - Sorting Materials into Groups  View Answer

 Chalk does not dissolve in water; it is insoluble. Instead, it breaks into small particles and settles at the bottom.

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

NCERT Solutions for Class 6 Science - Sorting Materials into Groups  View Answer

Wood is less dense than water, which allows it to float.

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

NCERT Solutions for Class 6 Science - Sorting Materials into Groups  View Answer

Sugar is soluble in water and dissolves readily when mixed.

(vi) Oil mixes with water.
Ans: False

NCERT Solutions for Class 6 Science - Sorting Materials into Groups  View Answer

Oil does not mix with water because it is less dense and forms a separate layer on top of the water.

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

NCERT Solutions for Class 6 Science - Sorting Materials into Groups  View Answer

Sand is insoluble in water and sinks to the bottom due to its density.

(viii) Vinegar dissolves in water.
Ans: True

NCERT Solutions for Class 6 Science - Sorting Materials into Groups  View Answer

Vinegar is soluble in water and mixes completely to form a uniform solution.


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:

NCERT Solutions for Class 6 Science - Sorting Materials into Groups

  • 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.

The document NCERT Solutions for Class 6 Science - Sorting Materials into Groups is a part of the Class 6 Course Science Class 6.
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FAQs on NCERT Solutions for Class 6 Science - Sorting Materials into Groups

1. सामग्री को समूहों में वर्गीकृत करने का क्या महत्व है ?
Ans. सामग्री को समूहों में वर्गीकृत करने से हमें उनकी विशेषताओं और उपयोगों को समझने में मदद मिलती है। इससे हम समान गुण वाले पदार्थों को एक साथ रख सकते हैं, जिससे अध्ययन और संगठन में आसानी होती है।
2. सामग्री को वर्गीकृत करने के लिए कौन-कौन से मानदंडों का उपयोग किया जा सकता है ?
Ans. सामग्री को वर्गीकृत करने के लिए कई मानदंडों का उपयोग किया जा सकता है, जैसे कि भौतिक विशेषताएँ (जैसे रंग, आकार, कठोरता), रासायनिक विशेषताएँ (जैसे अम्लीयता, क्षारीयता), और उपयोग (जैसे घरेलू, औद्योगिक)।
3. क्या सभी सामग्री को एक ही समूह में रखा जा सकता है ?
Ans. नहीं, सभी सामग्री को एक ही समूह में नहीं रखा जा सकता। अलग-अलग सामग्री की विशेषताएँ और उपयोग भिन्न होते हैं, इसलिए उन्हें उचित समूहों में वर्गीकृत किया जाना चाहिए।
4. समूह बनाने के लिए कौन-कौन से उदाहरण दिए जा सकते हैं ?
Ans. समूह बनाने के लिए कई उदाहरण दिए जा सकते हैं, जैसे कि धातुएं (जैसे लोहे, एल्युमिनियम), गैर-धातुएं (जैसे प्लास्टिक, कागज), और प्राकृतिक सामग्री (जैसे लकड़ी, पत्थर)।
5. क्या वर्गीकरण से अध्ययन करने में सरलता होती है ?
Ans. हाँ, वर्गीकरण से अध्ययन करने में सरलता होती है। जब हम सामग्री को उनके गुणों के आधार पर समूहों में विभाजित करते हैं, तो हमें उन्हें समझना और याद रखना आसान होता है, जिससे अध्ययन की प्रक्रिया प्रभावी होती है।
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