RBSE Class 6 Science Chapter 6 Question Answer Materials Around Us

By tackling these RBSE Class 6 Science Solutions and RBSE Class 6 Science Chapter 6 Materials Around Us Question Answer in English Medium, students will build a solid foundation in the topic.

Materials Around Us Class 6 Questions and Answers

RBSE Class 6 Science Chapter 6 Materials Around Us Question Answer

Materials Around Us Class 6 Question Answer – InText

Page 104

Question 1.
Would it be a good idea to use paperlike materials for making cooking utensils?
Answer:
No, because the material to make an object is chosen based on its properties and its purpose.

Page 110

Question 2.
Is water transparent? Can it be made opaque?
Answer:
Yes, water is transparent. It can be made opaque by adding insoluble substances.

Page 111

Question 3.
Does everything you put in water disappear?
Answer:
No, some materials do not dissolve in water and do not disappear eveh if they are dissolved for a long time.

Page 115

Question 4.
Are there any properties which can be shown by all materials? If yes, what are those?
Answer:
Yes, mass and volume are two properties that are exhibited by all materials.

RBSE Class 6th Science Chapter 6 Question Answer – Exercise

Let us enhance our learning

Question 1.
Visit your kitchen and observe how your parents have organised various edibles. Can you suggest a better sorting method? Write it in your notebook.
Answer:
In the kitchen, we usually store things in such a manner that similar utensils are placed together. Like all types of spices in one corner, pulses and grains in another comer and so on.

Question 2.
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

Answer:
(i) Matter—(b)
(ii) Soluble— (d)
(iii) Transparent—(a)
(iv) Luster—(c)

Question 3.
The containers which are used to store materials in shops and at home are usually transparent. Give your reasons for this.
Answer:
So that the material kept in these containers can be seen easily.

Question 4.
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.
(ii) Aluminium foil has lustre while an eraser does not.
(iii) Sugar dissolves in water whereas sawdust does not.
(iv) An apple is a matter because it occupies no space and has mass.
Answer:
(i) False, wood is opaque while glass is transparent.
(ii) True
(iii) True
(iv) False, an apple is a matter because it occupies space and has mass.

Question 5.
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).
(ii) Lightweight (easy to lift or to take from one place to another).
(iii) Does not feel very cold when sitting during winters.
(iv) Can be cleaned regularly and made to look new even after long use.
Answer:
(i) Hardness – wood, iron, lime, stone

(ii) Light weight – plastic, bamboo

(iii) Does not feel very cold when sitting during winters—wood, bamboo

(iv) Can be cleaned regularly and made to look new even after long use – plastic.

Question 6.
You need to have containers for collection of (i) food waste, (ii) broken glass and (iii) wastepaper. Which materials will you choose for containers of these types of waste? What properties of materials do you need to think of?
Answer:

1. For food waste, a light and strong container will be required and the material of the container should be such that it does not get spoiled by the moisture of the food items, so we will choose plastic material for this container.
2. For a broken glass, a container made of hard material will be required, so we will choose iron as the material for this.
3. A light container of paper will be required which should be made of paper or cardboard.

Question 7.
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
Answer:
(i) transparent, opaque

Question 8.
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.
Answer:
Material X—This material can be sugar because sugar feels hard on crunching and dissolves easily in water.

Material Y—This material can be clay because it easily changes its shape on pressing and remains unchanged on adding water.

Question 9.
(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?’
Answer:
(i) (a) Metal (b) Rubber (soft material) (c) Sugar (d) Butter paper (opaque) (e) Air
(ii) Who am I?
(a) I am liquid and insoluble in water.
(b) I make things shiny.
(c) I can be seen through.
(d) I am a gas and I am soluble in water.

(ii) (a) Oil (b) Wax (c) Glass (d) Oxygen

Question 10.
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.
Answer:
1. One ingredient is soluble in the other— (i) Vinegar, Water (ii) Glucose, Water

2. One ingredient is insoluble in the other— (i) Mustard Oil, Vinegar (ii) Wheat Flour, Water

RBSE Class 6 Science Chapter 6 Important Questions

Multiple Choice Questions

1. In which of the following substances there is no shine—
(a) Iron
(b) Wood
(c) Copper
(d) Silver
Answer:
(b) Wood

2. Sponge is a—
(a) hard material
(b) type of a metal
(c) soft material
(d) type of rough material
Answer:
(c) soft material

3. Which of the following is non soluble in water?
(a) Vinegar
(b) Hemon juice
(c) Kerosene oil
(d) None of these
Answer:
(c) Kerosene oil

4. Is not a translucent material—
(a) Oily paper
(b) Glass
(c) Butter paper
(d) X-ray sheet
Answer:
(b) Glass

5. Soluble in water—
(a) Kerosene
(b) Coconut oil
(c) Mustard oil
(d) Vinegar
Answer:
(d) Vinegar

6. Which of the following is not a metal?
(a) Zinc
(b) Aluminium
(c) Gold
(d) Plastic
Answer:
(d) Plastic

7. Is not a transparent material—
(a) Glass
(b) Metal
(c) Water
(d) Air
Answer:
(b) Metal

8. An example of hard substance is—
(a) sponge
(b) wood
(c) cotton
(d) candle
Answer:
(b) wood

9. The meaning of ‘snigdha is—
(a) unctous
(b) soft
(c) rough
(d) hot
Answer:
(a) unctous

10. The material not suitable for making glass is—
(a) Paper
(b) Glass
(c) Plastic
(d) Metal
Answer:
(a) Paper

Fill in the blanks

1. The method of arranging objects into groups is called …………………….. .
Answer:
classification

2. Anything that occupies space and has mass is called …………………….. .
Answer:
matter

3. The space occupied by matter is its …………………….. .
Answer:
volume

4. Mass quantifies the amount of …………………….. present in an object.
Answer:
matter

5. The materials through which we are not able to see at all are called …………………….. .
Answer:
opaque

6. Objects are made from large variety of …………………….. .
Answer:
materials

True/False

1. All substances dissolve in water. (True/False)
Answer:
False

2. Substances that have shine or lustre are generally metals. (True/False)
Answer:
True

3. Materials that cannot be seen through clearly are called transparent. (True/False)
Answer:
False

4. The material which is heavier has more mass and the one which is lighter has less mass. (True/False)
Answer:
True

Match the words given in Column-I with Column-II

Question 1.

Column-I	Column-II
1. Transparent	(a) Insoluble in water
2. Opaque	(b) Can be seen through the material clearly
3. Insoluble	(c) Cannot be seen through the material clearly
4. Translucent	(d) Cannot be seen through the material

Answer:

Column-I	Column-II
1. Transparent	(b) Can be seen through the material clearly
2. Opaque	(d) Cannot be seen through the material
3. Insoluble	(a) Insoluble in water
4. Translucent	(c) Cannot be seen through the material clearly

Question 2.

Column-I	Column-II
1. Glass	(a) Soluble
2. Oily paper	(b) Metal
3. Sugar	(c) Transparent
4. Iron	(d) Translucent

Answer:

Column-I	Column-II
1. Glass	(c) Transparent
2. Oily paper	(d) Translucent
3. Sugar	(a) Soluble
4. Iron	(b) Metal

Very Short Answer Type Questions

Question 1.
What is called ‘material’?
Answer:
The substances or mixture of substances used to make an object is called, material.

Question 2.
What are all objects made of?
Answer:
All objects are made of some material, such as cotton, wood, cloth, glass, sand, blast, clay etc.

Question 3.
Why can’t a glass made of cloth be used to store water?
Answer:
Because the materials required to make a glass should have the capacity to hold water.

Question 4.
How to determine which material should be used to make an object?
Answer:
We select the material for making an object on the basis of its properties and the purpose for which the object is to be used.

Question 5.
Why are different materials used to make balls of different games?
Answer:
The bounce, size, weight of the ball required for different games varies according to the game, so different materials are required to make them.

Question 6.
Give examples of metals?
Answer:
Iron, copper, aluminium and gold are examples of metals.

Question 7.
Which are the ‘soft’ substances?
Answer:
The substances which can be easily compressed or scratched are called soft substances like cotton and sponge.

Question 8.
What are hard substances?
Answer:
The substances which are difficult to compress or scratch are called hard substances.

Question 9.
Some metals often lose their lustre. Why does this happen?
Answer:
This happens due to the effect of air and moisture on metals.

Question 10.
What is a ‘matter’?
Answer:
Anything that occupies space and has mass is called matter.

Question 11.
What is a ‘substance’?
Answer:
The pure form of matter is called a substance, such as water, sugar, salt, iron, oxygen etc.

Question 12.
What is ‘terracotta’?
Answer:
Baked clay is called terracotta.

Question 13.
Can we use different materials to make different parts of an object?
Answer:
Yes, for example, a pen can be made of different materials such as plastic, metal and ink.

Question 14.
What properties can different materials have?
Answer:
Different materials can have different properties, such as lustrous, softness, shape and colour etc.

Question 15.
What is the role of water in the functions of our body?
Answer:
Water plays an important role in the processes taking place in our body because it can dissolve many materials.

Question 16.
Are gases soluble in water?
Answer:
Some gases are soluble in water. For example, oxygen gas dissolves in water.

Question 17.
Drinking water and milk bottles are labelled 500 mL. What does this label indicate?
Answer:
This label indicates volume.

Question 18.
What is crucible?
Answer:
Crucible is a vessel used for melting substances which is made of clay and iron.

Short Answer Type Questions

Question 1.
On the basis of the property of compressibility, in how many types can substances be classified? Explain with examples.
Answer:
On the basis of the property of compressibility, substances can be classified into two types—
(i) Soft substances—Substances that can be easily compressed are called soft substances.
Example – cotton, sponge, rubber etc.

(ii) Hard substances—Substances that cannot be easily compressed are called hard substances.
Example—wood, stone, beads etc.

Question 2.
Are all shiny objects metals?
Answer:
Not all the materials that shine are metals. Surfaces of some materials are made shiny by polishing or coating them with thin layers of plastic, wax or any other material which makes them look shiny. These materials may not be metals.

Question 3.
Do liquids like oil, vinegar, honey dissolve in water?
Answer:
Some liquids get completely mixed with water like vinegar whereas some do not mix with water and form a separate layer when left undisturbed for some time like oil.

Question 4.
What can be found out from the mass of the material in an object?
Answer:
It can be found out from the mass of an object or material whether that material is heavy or light, when their composition is the same. The material which is heavier has more mass and the one which is lighter has less mass.

Question 5.
Differentiate between mass and volume.
Answer:

Mass	Volume
(i) Mass is the measure of the amount of matter present in an object.	(i) The space occupied by a substance is its volume.
(ii) Mass is measured in units of gram (g) and kilogram (kg).	(ii) Volume is measured in units of litre (L) and millilitre (mL).

Question 6.
Differentiate between ‘lustrous’ and ‘non-lustrous’ materials.
Answer:

Lustrous Materials	Non-lustrous Materials
(i) Materials that typically have shiny surfaces are said to have a lustrous appearance. Such materials with lustre are usually metals.	(i) Non-lustrous materials are those that do not have a shiny surface.
(ii) Examples of metals include iron, copper, zinc, aluminium, gold, etc.	(ii) Examples of non- lustrous materials are paper, wood, rubber, jute, etc.

Question 7.
Differentiate between ‘soluble’ and ‘non-soluble’ materials.
Answer:

Soluble Materials	Non-soluble Materials
(i) Materials which become completely invisible on mixing in water (liquid) i.e. dissolve in water, are called soluble materials.	(i) Materials which do not dissolve in water (liquid) and do not disappear even after dissolving for a long time are called insoluble materials.
(ii) Salt, sugar, vinegar, lemon juice etc are soluble materials.	(ii)Sand, chalk powder, sawdust etc. are insoluble materials.

Long Answer Type Questions

Question 1.
What is classification? Objects are classified on the basis of their properties. Explain with examples.
Answer:
The method of arranging the objects into groups is called classification. Objects can be classified on the basis of similarity or difference in their properties. For example, in the kitchen, we usually store things in such a manner that similar utensils are placed together. Similarly, a grocer usually keeps all types of spices in one comer, pulses and grains in another comer and so on.

Question 2.
Explain transparent, opaque and translucent materials with examples.
Answer:
(i) Transparent materials— The materials, through which things can be seen clearly, are called transparent. Glass, water, air, cellophane paper, etc., are some examples of transparent materials.

(ii) Opaque materials— There are many materials through which you are not able to see at all.
These materials are called opaque. Wood, cardboard and metals are examples of opaque materials.

(iii) Translucent materials— The materials through which objects can be seen, but not clearly, are known as translucent. Butter paper and frosted glass are examples of translucent materials.

Question 3.
What do you understand by ORS? How is it prepared?
Answer:
ORS—Oral Rehydration Solution— is used to treat dehydration due to diarrhoea or other illnesses. These ready-made ORS packets are available in primary health centres and also in the market. Each packet is dissolved in a litre of water before use. If these are not available, ORS can be prepared at home by mixing six teaspoons of sugar and half a teaspoon of common salt in one litre of boiled and cooled water.

Question 4.
Explain the classification system that existed in ancient India with the help of an example.
Answer:
The classification system existed in ancient India. Ayurveda, one of the Indian medical systems, too has a system of grouping things. The 20 properties (guna—ten pairs of opposite properties), are used to describe all physical matter in Ayurveda. These properties can also be used to describe all living systems (plants, animals and humans), the environment and also food.

Some of the properties ar e-guru (heavy), laghu (light in weight), manda (slow), tikshna (quick, fast), hima (cold), uchna (hot), etc.

Essay Type Questions

Question 1.
In what way were the pottery made in ancient Indian subcontinent? What was the purpose of making these pottery?
Answer:
The earliest pottery found in the Indian subcontinent dates back to 7,000 to 8,000 years in the Ganga plains (Lahuradewa) and in Baluchistan (Mehrgarh). About 4000 BCE onwards, Sindhu Sarasvati developed techniques of wheel- turned pottery production, pigmentation, application of protective or decorative coats (called ‘slips’) of multiple colours, decorative painting, etc. These techniques became further sophisticated during the Sindhu-Sarasvati (also known as ‘Harappan’) Civilisation (2600-1900 BCE), with a bright red surface painted with black-coloured designs displaying geometric patterns, and aquatic and terrestrial animals. The clay used for making pots, dishes, bowls and other items was carefully selected and cleaned, sieved, kneaded, turned over a wheel and finally baked in kilns (baked clay is called Terracotta’). Pots were used for various purposes, from cooking to storage of food grains, oil, ghee, and so on.

Question 2.
Comment – (i) Unit of mass, (ii) Unit of volume.
Answer:
(i) Unit of mass— Kilogram is the unit of mass in the International System of Units (SI). Kilogram is abbreviated in lower case as kg. There is no space between ‘k’ and ‘g’ in kg, and no full stop after the symbol, except at the end of a sentence. While writing the mass, always leave a space between the number (numerical value) and the unit.

(ii) Unit of volume— Litre is abbreviated as capital L and millilitre as mL. There is no space betw een ‘m’ and ‘L’ in mL. For example, if you have 500 millilitres of water, it would be written as 500 mL, m w ill be in lower case and L will be in upper case. The SI unit for volume is cubic metre, abbreviated as m³. The abbreviation is written with a superscript 3 to denote cubic metre. For example, if you have volume of 2 cubic metres, it would be written as 2 m³. Always leave a space between number (numerical value) and the unit. 1 m³ =1000 L.

Question 3.
Describe the main properties of materials?
Answer:
Materials have different properties, which are important for their use. The main properties among these are—
(1) Appearance— Different materials have similar appearance. Some materials have shiny surface and lustrous appearance, like metals, while some materials are dull (non-lustrous), like paper, wood etc.

(2) Hard and soft— Materials which can be compressed or scratched easily are soft, while other materials which are difficult to compress or scratch are hard.

(3) Soluble—  Those materials dissolve in water or, in other words, they are soluble in water are called water soluble, like sugar, while some materials do not mix with water and do not disappear even after we stir them for a long time. They are called insoluble materials, e.g. sand.

(4) Transparency— The materials, through which things can be seen clearly, are called transparent. Glass, water, air, cellophane paper, etc., are some examples of transparent materials. There are many materials through which you are not able to see at all. These materials are called opaque. Wood, cardboard and metals are examples of opaque materials. The materials through which objects can be seen, but not clearly, are known as translucent. Butter paper and frosted glass are examples of translucent materials.

RBSE Class 6 Science Chapter 6 Notes

Class 6 Science Chapter 6 Notes RBSE – Materials Around Us Class 6 Notes

1. All objects are made of some material. Such as paper, wood, cloth, glass, metal, plastic, clay etc.
2. An object can be made up of a single material or a combination of different materials. We can use different materials to make objects with similar functions.
3. The method of arranging objects into groups is called classification. Objects can be divided into groups on the basis of their similar properties.
4. Materials can be grouped based on appearance, such as lustrous or non-lustrous and based on the feel, such as hard or soft.
5. Materials are grouped as transparent, translucent or opaque depending on how much we can see through them.
6. Materials can have different properties, such as lustre, hardness, softness, shape and colour etc.
7. Some materials are soluble in water while others are insoluble.
8. Anything that occupies space and has mass is called matter.
9. The space occupied by matter is its volume.
10. Mass quantifies the amount of matter present in an object.