Sorting Materials into Groups


Mention some materials which are made up of paper.


Books, notebooks, newspapers, toys, calendars, etc.


Sorting Materials into Groups

Q 1.

Which is more hard, sponge or iron?

Q 2.

Describe an experiment to prove that water is transparent.

Q 3.

Name the naturally occuring hardest substance known.

Q 4.

Name some substances which are made from plastics.

Q 5.

Why is water called a universal solvent?

Q 6.

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.

Q 7.

Name two objects which are made from opaque materials.

Q 8.

Is a substance which can be compressed soft or hard?

Q 9.

Write two substances which are made from leather.

Q 10.

Name five objects which can be made from wood.

Q 11.

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

Q 12.

Write two gases which are soluble in water.

Q 13.

Why is water important for our body?

Q 14.

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

Q 15.

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

Q 16.

Suggest two bases on which we can group objects.

Q 17.

Name two gases which are insoluble in water.

Q 18.

List three liquids which are transparent.

Q 19.

Name a non-metal that has lustre.

Q 20.

What is the reason for grouping materials?

Q 21.

Write any four properties of materials.

Q 22.

Mention some materials which are made up of paper.

Q 23.

What are the similarities between iron, copper and aluminium?

Q 24.

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

Q 25.

Select a lustrous material out of the following substances:

Q 26.

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

Q 27.

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.

Q 28.

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

Q 29.

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

Q 30.

Is oil soluble in water?

Q 31.

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.

Q 32.

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

Q 33.

What is the basis for sorting materials?

Q 34.

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

Q 35.

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

Q 36.

Write an experiment to show that our palm is translucent.

Q 37.

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

Q 38.

What is common between salt and sand?

Q 39.

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

Q 40.

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?