Materials around us Class 6 - Chapter 6 Curiosity

(Page 119) Visit your kitchen and observe how your parents have organised various edibles. Can you suggest a better sorting method? Write it in your notebook.In my kitchen, edibles are kept randomly on different shelves.
I suggest sorting them by type - grains, spices, snacks, and vegetables - and labelling containers. This will make the kitchen neat and items easy to find.

(Page 119) Unscramble the letters (Column I) and match with their properties (Column II).Column I Column II
(i) TREMAT (a) Objects can be seen clearly through it
(ii) ULSBELO (b) Occupies space and has mass
(iii) TNERPASNART (c) Shiny surface
(iv) ERUSTL (d) Mixes completely in water
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Column I Column II
(i) MATTER (a) Objects can be seen clearly through it
(ii) SOLUBLE (b) Occupies space and
(iii) TRANSPARENT (c) Shiny surface
(iv) LUSTRE (d) Mixes completely in water

(Page 120) The containers which are used to store materials in shops and at home are usually transparent. Give your reasons for this.Containers used to store materials in shops and at home are usually transparent so that we can see what is inside without opening the container.
This saves time and avoids confusion.

(Page 120) State whether the statements given below are True [T] or False [F]. Correct the False statement(s). (i) Wood is translucent while glass is opaque.False
Wood is Opaque while Glass is Transparent

(Page 120) State whether the statements given below are True [T] or False [F]. Correct the False statement(s). (ii) Aluminium foil has lustre while an eraser does not. True
Aluminium Foil is a Shiny metal (Lustrous Object) while an eraser is a Non - Lustrous Object
Aluminium Foil
(Shiny)
Eraser
(Not Shiny)

(Page 120) State whether the statements given below are True [T] or False [F]. Correct the False statement(s). (iii) Sugar dissolves in water whereas sawdust does not.True
Sugar disappears so Sugar is soluble in water

(Page 120) State whether the statements given below are True [T] or False [F]. Correct the False statement(s). (iv) An apple is a matter because it occupies no space and has mass. False , an Apple is a matter because it occupies space and has mass

(Page 120) We see chairs made up of various materials, such as wood, iron, plastic, bamboo, cement and stones. Following are some desirable properties of materials which can be used to make chairs. Which materials used to make chairs fulfil these properties the most? (i) Hardness (does not bend or shake on sitting even after long use). Wood
Less Hard
Iron
Very Hard
Wood
Less Hard
Bamboo
Less Hard
Cement
Very Hard
Stone
Very Hard

(Page 120) We see chairs made up of various materials, such as wood, iron, plastic, bamboo, cement and stones. Following are some desirable properties of materials which can be used to make chairs. Which materials used to make chairs fulfil these properties the most? (ii) Lightweight (easy to lift or to take from one place to another)Wood
Heavy but can
be lifted
Iron
Heavy but can
be lifted
Plastic
Lightweight
Bamboo
Lightweight
Cement
Can’t be Lifted
Stone
Can’t be Lifted

(Page 120) We see chairs made up of various materials, such as wood, iron, plastic, bamboo, cement and stones. Following are some desirable properties of materials which can be used to make chairs. Which materials used to make chairs fulfil these properties the most? (iii) Does not feel very cold when sitting during winters.Wood
Does not feel cold
Iron
Feel very cold
Plastic
Does not feel cold
Bamboo
Does not feel cold
Cement
Feel very cold
Stone
Feel very cold

(Page 120) We see chairs made up of various materials, such as wood, iron, plastic, bamboo, cement and stones. Following are some desirable properties of materials which can be used to make chairs. Which materials used to make chairs fulfil these properties the most? (iv) Can be cleaned regularly and made to look new even after long use.Wood
Looses Polish on Cleaning
Iron
Gets Rust after
Sometime
Plastic
Easy to Clean
Looks new for long
Bamboo
Looks same whether clean or dirty
Cement
Looks same whether clean or dirty
Stone
Looks same whether clean or dirty

(Page 120) You need to have containers for collection of: (i) food waste (ii) broken glass (iii) wastepaper Which materials will you choose for containers of these types of waste? What properties of materials do you need to think of?Type of Waste Suitable Container Material Properties Needed
(i) Food waste Plastic Dustbin Plastic does not react with food, is easy to wash, and does not absorb smell (like paper bag)
(ii) Broken glass Plastic Dustbin We can't use Plastic or Paper bag because it will tear so we use Plastic Dustbin which is Strong and Rigid
(iii) Wastepaper Cardboard Carton It is lightweight and easy to carry.

(Page 120) Air is all around us but does not hinder us from seeing each other. Whereas, if a wooden door comes in between, we cannot see each other. It is because air is ……………….…… and the wooden door is ………………... . Choose the most appropriate option: (i) transparent, opaque (ii) translucent, transparent (iii) opaque, translucent (iv) transparent, translucent
Air is Transparent
Wooden Door is Opaque

(Page 120 and 121) Imagine you have two mysterious materials, X and Y. When you try to press material X, it feels rigid and does not change its shape easily. On the other hand, material Y easily changes its shape when you press it. Now, when you mix both materials in water, only material X dissolves completely, while material Y remains unchanged. What can materials X and Y be? Can you identify whether material X is hard or soft? What about material Y? Justify your answer. Material X can be Crystal of Sugar
Material Y can be Plastic

(Page 121) (i) Who am I? Identify me on the basis of the given properties. (a) I have lustre. (b) I can be easily compressed. (c) I am hard and soluble in water. (d) You cannot see clearly through me. (e) I have mass and volume but you cannot see me. (ii) Make your own ‘Who am I?’ I keep on changing but I am not a matter. …………...........
Cotton
Sugar
Frosted Glass
Air
I keep on changing but I am not a matter.

(Page 121) You are provided with the following materials - vinegar, honey, mustard oil, water, glucose and wheat flour. Make any two pairs of materials where one material is soluble in the other. Now, make two pairs of materials where one material remains insoluble in the other material.Pairs of Materials where one material is soluble in the other
Pair 1: Glucose + Water
Pair 2: Vinegar + Water
Pairs of Materials where one material is insoluble in the other
Pair 1: Mustard Oil + Water
Pair 2: Wheat Flour + Water