science - sorting materials into groups

Class 6 - Science

Sorting Materials into Groups

Q&A
Question:

What is the reason for grouping materials?

Answer:

Materials are grouped for our convenience to study their properties and also observe any patterns in these properties.



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Questions and Answers


Sorting Materials into Groups - Questions
1.

Write any four properties of materials.


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2.

Grouping of objects helps the shopkeeper.' Justify the statement.


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3.

Why do we need to group materials? Give one reason.


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4.

Suggest two bases on which we can group objects.


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5.

Write two substances which are made from leather.


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6.

Why is water important for our body?


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7.

What is the reason for grouping materials?


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8.

Why is water called a universal solvent?


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9.

Is a substance which can be compressed soft or hard?


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10.

Why is a tumbler not made with a piece of cloth?


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11.

Mention some materials which are made up of paper.


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12.

Name five objects which can be made from wood.


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13.

Find the odd one out from the following:
(a) Chair, Bed, Table, Baby, Cupboard
(b) Rose, Jasmine, Boat, Marigold, Lotus
(c) Aluminium, Iron, Copper, Silver, Sand
(d) Sugar, Salt, Sand, Copper sulphate


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14.

Select a lustrous material out of the following substances:


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15.

Make a table and find out whether the following materials mix with water: Vinegar, Lemon juice, Mustard oil, Coconut oil, Kerosene.


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16.

Name the naturally occuring hardest substance known.


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17.

Name two objects which are made from opaque materials.


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18.

List three liquids which are transparent.


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19.

Name some substances which are made from plastics.


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20.

Metals generally occur in solid state and are hard. Name a metal that exists in liquid state and a metal that is soft and can be cut with knife.


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21.

Which is more hard, sponge or iron?


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22.

Metals have lustre (shine). Give reason why some metal articles become dull and loose their shine.


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23.

Describe an experiment to prove that water is transparent.


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24.

Name two gases which are insoluble in water.


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25.

What are the similarities between iron, copper and aluminium?


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26.

Name a non-metal that has lustre.


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27.

Write two gases which are soluble in water.


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28.

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


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29.

What is the basis for sorting materials?


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30.

State whether the statements given below are ‘true' or ‘false'.
(i) Stone is transparent, while glass is opaque.
(ii) A notebook has lustre while eraser does not
(iii) Chalk dissolves in water.
(iv) A piece of wood floats on water.
(v) Sugar does not dissolve in water.
(vi) Oil mixes with water.  
(vii) Sand settles down in water.
(viii) Vinegar dissolves in water.


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31.

Given below are the names of some objects and materials:
 Water, basket ball, orange, sugar, globe, apple and earthen pitcher Group them as:
(a) Round shaped and other shapes
(b) Eatables and non-eatables


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32.

Is oil soluble in water?


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33.

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.


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34.

Which material is generally used for making pens?Wood, aluminium, plastic, cotton


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35.

Write an experiment to show that our palm is translucent.


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36.

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


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37.

Make a table of different types of objects that are made from the same material.


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38.

How can you show that some solids like sugar, salt are soluble in water whereas solids like chalk powder and sand are not soluble in water?


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39.

Kerosene, coconut oil, mustard oil do not dissolve in water, even on shaking. They separate after sometime forming two different layer. Explain why.


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40.

What is common between salt and sand?


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