Class 6 - Science - CH4 - Sorting Materials into Groups
Q1: Name five objects which can
be made from wood.
Answer:
- Chair
- Table
- Plough,
- Bullock cart and its wheels
- Door
Glass bowl, plastic toy,
steel spoon, cotton shirt
Answer: Objects which shine are: Glass bowl and 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.
Objects | Materials |
---|---|
Book | Glass |
Tumbler | Wood |
Chair | Paper |
Toy | Leather |
Shoes | Plastics |
Answer:
Objects | Materials |
---|---|
Book | Paper |
Tumbler | Glass |
Chair | Wood |
Toy | Plastics |
Shoes | Leather |
Q4: 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.
(vi) Oil mixes with water.
(vii) Sand settles down in water.
(viii) Vinegar dissolves in water.
Answer:
(i) Stone is transparent, while
glass is opaque. ✗ (False)
(ii) A notebook has lustre while
eraser does not. ✗ (False)
(iii) Chalk dissolves in water.
✗ (False)
(iv) A piece of wood floats on
water. ✓ (True)
(v) Sugar does not dissolve in water.
✗ (False)
(vi) Oil mixes with water. ✗ (False)
(vii) Sand settles down in water. ✓ (True)
(viii) Vinegar dissolves in water. ✓ (True)
(vi) Oil mixes with water. ✗ (False)
(vii) Sand settles down in water. ✓ (True)
(viii) Vinegar dissolves in water. ✓ (True)
Q5: Given below are the names of
some objects and materials:
Water, basket ball, orange, sugar, globe, apple and earthen pitcher
Water, basket ball, orange, sugar, globe, apple and earthen pitcher
Group them as:
(a) Round shaped and other shapes
(b) Eatables and non eatables
(a) Round shaped and other shapes
(b) Eatables and non eatables
Answer:
(a) Round shaped and other
shapes:
Round Shaped | Other Shapes |
---|---|
Basket
Ball Orange Globe Earthen Pitcher |
Water
Apple Sugar |
(b) Eatables and non
eatables
Eatables | Non Eatables |
---|---|
Water, Orange, Sugar, Apple |
Basket
Ball Globe 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.
Answer: Paper strip, Balloon, Hair, plastic bottle,
Wood, Boat etc. will float on water. A few of these like hair, balloon can float
on kerosene or oil.
Generally, substances have less density
than oil and water can float. For example, few types of wood have densities
higher than oil but less than water, so it floats on water but not on
kerosene.
Q7: 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:
(a) Baby (rest are made up of
wood).
(b) Boat (others are flowers)
(c) Sand (others are metals).
(d) Sand (others are soluble in
water).
Q8: How can materials be grouped together? In what ways do we classify materials?
Answer: Different materials have different
properties. Depending on the similar properties among different materials, these
can be grouped together.
Different types of materials can be
grouped based on the following properties they posses:
- Appearance,
- Solubility,
- Transparency,
- Conductivity
- Combustible - Easily burn or not.
- Attracts towards magnet
Q9: Why do we classify
materials in different groups?
Answer: Different materials are grouped for the
following reasons:
- For our convenience. For example we can easily locate and identify them.
- It helps us study their properties and identify common patterns among them.
Q10: What do you call a
substance through which things are partially visible?
Answer: Translucent object.
Q11: Name the materials that
have fixed volume but not fixed shape.
Answer: Liquids like water, oil etc.
Q12: Roma has a bag full of
apples. A few of these apples are rotten. How does Roma separate rotten apples
from good ones?
Answer: By looking and smelling them, Roma can
identify rotten apples. Rotten ones look mushy and pulpy and smell
bad.
Q13: Is Oiled paper transparent,
translucent or opaque?
Answer: Translucent.
Q14: Give examples of
transparent materials.
Answer: Glass, water, air and some
plastics.
Q15: Why do shopkeepers prefer
to keep biscuits, sweets and other eatables in transparent
containers?
Answer: Because buyers can easily see these
items.
Q16: Which of the following
objects are soluble in water?
Chalk powder, sugar, clay, table
salt
Answer: Sugar and salt are soluble in water, while
chalk powder and clay are not soluble in water.
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