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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.

Why is water important for our body?


Answer
2.

What is the reason for grouping materials?


Answer
3.

Why is water called a universal solvent?


Answer
4.

Write two gases which are soluble in water.


Answer
5.

Which is more hard, sponge or iron?


Answer
6.

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


Answer
7.

Describe an experiment to prove that water is transparent.


Answer
8.

Name five objects which can be made from wood.


Answer
9.

Name some substances which are made from plastics.


Answer
10.

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


Answer
11.

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
12.

List three liquids which are transparent.


Answer
13.

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


Answer
14.

Name two objects which are made from opaque materials.


Answer
15.

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


Answer
16.

Write two substances which are made from leather.


Answer
17.

Select a lustrous material out of the following substances:


Answer
18.

Is a substance which can be compressed soft or hard?


Answer
19.

Name the naturally occuring hardest substance known.


Answer
20.

Mention some materials which are made up of paper.


Answer
21.

Write any four properties of materials.


Answer
22.

Suggest two bases on which we can group objects.


Answer
23.

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.


Answer
24.

Name two gases which are insoluble in water.


Answer
25.

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


Answer
26.

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


Answer
27.

What are the similarities between iron, copper and aluminium?


Answer
28.

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


Answer
29.

Name a non-metal that has lustre.


Answer
30.

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


Answer
31.

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


Answer
32.

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.


Answer
33.

Is oil soluble in water?


Answer
34.

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


Answer
35.

What is the basis for sorting materials?


Answer
36.

Write an experiment to show that our palm is translucent.


Answer
37.

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


Answer
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?


Answer
39.

What is common between salt and sand?


Answer
40.

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


Answer
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