Haryana State Board HBSE 6th Class Science Solutions Chapter 4 Sorting Materials Into Groups Textbook Exercise Questions and Answers.
Haryana Board 6th Class Science Solutions Chapter 4 Sorting Materials Into Groups
HBSE 6th Class Science Sorting Materials Into Groups Textbook Questions and Answers
Exercises
Question 1.
Name five objects which can be made from wood.
Answer:
Objects which can be made from wood are:
- Chair
- Table
- Desk
- Double bed
- Stool
- Almirah.
Question 2.
Select those objects from the following which shine :
Glass bowl, plastic toy, steel spoon, cotton shirt.
Answer:
Glass bowl, steel spoon.
Question 3.
Match the following things with the materials from which they are made :
| Things | Materials |
| (i) Book | Glass |
| (ii) Tumbler | Wood |
| (iii) Chair | Paper |
| (iv) Toy | Leather |
| (v) Shoes | Plastic. |
Answer:
(i) paper
(ii) glass
(iii) wood
(iv) plastics
(v) leather.
Question 4.
State whether the statements given below are true or false :
(i) Stone is transparent, while glass is opaque.
(ii) A note book 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:
(i) False
(ii) False
(iii) True
(iv) True
(v) False
(vi) False
(vii) True
(viii) True.
Question 5.
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 shape.
(b) Eatables and non-etables.
Answer:
Round-shaped object Other-shaped objects
- Basket ball
- Water
- Orange
- Sugar
- Globe
- Apple
- Earthen pitcher.
Question 6.
List all items known to you that float on water. Check and see if they will float on a oil or kerosene.
Answer:
- Dried leaves
- paper
- wax
- ice
- oil.
All these materials floats on water and they sink in oil and float on kerosene.
Question 7.
Find the odd one out from the following:
(a) Chair, Bed, Table, Baby, Cup-board.
(b) Rose, Jasmine, Boat, Marigold, Lotus.
(c) Aluminium, Iron, Copper, Silver, Sand.
(d) Sugar, Salt, Sand, Milk, Milk powder.
Answer:
(a) Baby
(b) Boat
(c) Sand
(d) Milk
HBSE 6th Class Science Sorting Materials into Groups Important Questions and Answers
Very Short Answer Type Questions
Question 1.
What do you mean by classification?
Answer:
The process of grouping things on the basis of some common properties is called classification.
Question 2.
How groupings of things are made?
Answer:
Goupings of things are done according to some similarities, necessities, and convenience to make it easier to work with them.
Question 3.
Name three things made from glass.
Answer:
Bowl, bottle, jug, katori.
Question 4.
Name two materials which are soluble in water.
Answer:
- Salt
- sugar.
Question 5.
Name five objects which are made from transparent materials.
Answer:
- Glass bowl
- Glass bottles
- Window pan
- Looking glass
- Pen.
Question 6.
List three liquids which are transparent.
Answer:
- Water
- Spirit
- Benzene.
Question 7.
List five objects which are made from opaque materials.
Answer:
- Table
- Chair
- Door
- Bed
- Black board.
Question 8.
What is common between salt and sand?
Answer:
Mass.
Question 9.
Name three bad conductors of heat.
Answer:
- Wood
- Rubber
- Paper.
Question 10.
Name three good conductors of heat.
Answer:
Aluminium, copper and iron.
Question 11.
Name five magnetic objects.
Answer:
Eraser, Pins, Iron nails, Scissors and steel spoon.
Question 12.
Name two objects made from plastics.
Answer:
- Mug
- Toys.
Question 13.
Name two substances which are insoluble in water.
Answer:
- Chalk
- Plaster.
Question 14.
Name four metals which are used in our daily life.
Answer:
- Aluminium
- Copper
- Brass
- Iron.
Question 15.
Write two properties of metals.
Answer:
- They look shining in appearance.
- Metals are good conductors of heat.
Question 16.
Name three liquids which are immiscible in water.
Answer:
- Mustard oil
- Glycerine
- Coconut oil.
Question 17.
Name three materials which float in water.
Answer:
- Wax
- wood
- ice.
Question 18.
Name three things which are non-magnetic.
Answer:
- Rubber
- Chalk
- Plastics
- Wood.
Question 19.
How can materials be grouped?
Answer:
Materials can be grouped on the basis of similarities and differences in their properties.
Question 20.
Name some combustible materials.
Answer:
Wood, paper and cotton.
Question 21.
Which are translucent materials?
Answer:
The materials through which things are only partially visible are called translucent materials.
Short Answer Type Questions
Question 1.
What are objects made of?
Answer:
- An object can be made from different materials. For example, your shoes can be made of canvas, leather, rubber or plastics.
- Different objects can be made from the same material. For example, flower vase, window panes, glass jar, fish aquarium are made from the same material.
- An object or a thing can be made using more than one material. For example, idli is made of rice, urad dal, salt and water.
Question 2.
Mention three properties of materials.
Answer:
Three important properties of materials are described below :
- Physical State : All materials can be classified as solid, liquid and gas. We cannot see gases but we can feel their presence.
- Appearance : Any material can be described in terms of its colour, lustre, texture or hardness.
- Solubility : All materials can be soluble or insoluble in water. For example, sugar is soluble in water but sand is insoluble in water. Liquid and gases may also be soluble or insoluble in water.
Question 3.
Write three common characteristics of materials.
Answer:
- All materials can be felt by one or more of our senses.
- All materials occupy space.
- All materials possess mass.
Question 4.
Why are handles of utensils made from wood or plastics?
Answer:
The handles of utensils are made from wood or plastics because utensils are good conductors of heat and wood and plastics are bad conductors of heat. They do not allow the heat transmission through them. So the handles of utensils are made from wood or plastics so that we do not burn our hands while handling these utensils when they are hot.
Question 5.
Name two gases which are soluble and two gases which are insoluble. What is the importance of gases dissolved in water?
Answer:
→ Gases which are soluble in water: Oxygen and Carbon dioxide.
→ Gases which are insoluble in water: Hydrogen, Nitrogen.
The oxygen dissolved in water helps aquatic plants and animals. Carbon dioxide dissolved in water helps the plants living in water for photosynthesis.
Question 6.
X, Y and Z are three types of materials. The materials X and Y can break into pieces easily when hit with an object but material Z does not break easily. The material X is used in the windows of bathrooms in our house whereas material Y is used in the windows of our drawing room. The material Z is used in making doors and almirahs in our house.
(a) What do you think material X could be? What is the general name of materials liheX?
(b) What could material Y be? Write the general name of materials like Y.
(c) What could material Z be? What is the general name of material like Z?
Answer:
(a) Ground glass : Translucent materials
(b) Clear glass: Transparent materials
(c) Wood : Opaque Materials.
Question 7.
Why cotton floats on water?
Answer:
Cotton has large number of pores in it. The air gets trapped in it thereby reducing its density (by increasing the volume of cotton by air). Therefore cotton floats on water. But when these pores get filled with water it starts sinking.
Question 8.
A few things have been grouped as follows. Identify the property common to all things in each group.
Group – I : Glass, Cup, Bucket, Mug, Jug
Group – II : Man, Cow, Camel
Group – III : Copper, Iron, Silver, Gold
Answer:
Group – I: Containers – all are made of plastic/steel.
Group – II: Living beings-all are mammals.
Group – III : All are metals.
Question 9.
Which among kerosene and glycerine is miscible in water? How will you find out?
Answer:
Glycerine is miscible in water.
Take some water in two test tubes. Put a few drops of glycerine into one test tube and a few drops of kerosene into the other. Shake them well. Glycerine mixes with water and cannot be seen separately. Kerosene does not mix with water. It can be seen as a separate layer on the top of water.
Question 10.
Give an activity to observe flow of heat in metal and wood.
Answer:
Take a cup and fill it partly with hot water. Place two spoons in it – one made of aluminium and the other made of wood. After a minute, touch the upper top of each spoon. You will observe that the aluminium spoon is hotter than the wooden spoon. This is because heat can flow quickly through aluminium but not so in wood.
Long Answer Type Questions
Question 1.
What are the advantages of classification/grouping things or materials?
Answer:
The advantages of classification/ grouping of things or materials are as under:
- Classification helps to understand similarities and dissimilarities among the objects.
- Classification helps location of things. It is only because of classification that you are able to locate a book that you need out of thousands in your school library.
- Classification of objects helps their identification.
- Classification makes study of different objects easy and more meaningful. Rather than studying each object separately, we can study just one out of each class of different objects and generalize our results for the class as a whole.
- Classification helps us to know the material of which the object is formed.
Question 2.
List the characteristics of solids, liquids and gases and give an example of each.
Answer:
Solids : All solids have the following characteristics :
- They have a definite shape and volume.
- They cannot be compressed easily.
- The particles they are made of are packed very tightly.
Examples : Gold and wood.
Liquids : All liquids have the following characteristics:
- They have a definite volume but no definite shape. They take the shape of the container they are poured in.
- They can be compressed more easily than solids.
- The particles they are made up of are not so tightly packed as in solids.
Examples : Water and alcohol.
Gases : All gases have the following characteristics:
- They have no definite shape or volume.
- They can be compressed very easily.
- The particles they are made up of are packed loosely.
Examples : Oxygen and Carbon dioxide.
Question 3.
Discuss important properties of matter. (Any five)
Answer:
Some important properties of matter are discussed below:
- Appearance: Materials (or matter) can be classified on the basis of their appearance. Different materials have different appearances.
- Lustre : Materials can be classified on the basis of their lustre. Some shine a lot whereas others are quite dull.
- Texture : Different materials feel different when touched, so they have different textures.
- State: Most materials can be placed into one of the three groups : Solid, liquid or gas.
- Solubility in water: Some substances are soluble in water, others are insoluble. Miscible liquids mix with each other, immiscible liquids do not.
Sorting Materials into Groups Class 6 HBSE Notes
1. There is a large variety of things around us, some of familiar furniture may be chairs, tables, almirah, utensils, books, clothes, toys, television, refrigerator and other household items.
2. Different things can be used for making different types of materials.
3. Different types of materials have different properties such as appearance, solubility, transparency, conductivity and behaviour towards magnets etc.
4. Things can be grouped on the basis of their properties of materials from which they are made. Similar things are arranged together for convenience.
5. Materials which have lustre are called metals. Iron, copper, aluminium and gold are some examples of metals. Thus metals have a lustre and are called lustrous materials.
6. The surface of a material could be smooth or rough. Such as a stone feels rough on touching and metal surfaces are smooth to touch.
7. Materials may be hard or soft. Materials which are difficult to press are called hard and which can be pressed easily are called soft.
8. Substances which dissolve in water are called soluble and which remain the same are called insoluble.
9. Those liquids which mix well with water are said to be miscible and others which do not mix well are known as immiscible in water.
10. Some gases are soluble in water such as oxygen gas which dissolves in water is very important for the survival of aquatic animals.
11. Some materials like sand, sugar and salt sink in water and such materials like wax and oils float on water.
12. Materials may be transparent, opaque and translucent. Materials through which things can be seen are called transparent and materials through which you things are not able to see are called opaque and materials through which things are only partially visible; are called translucent.
13. Those materials/substances which allow the transmission of heat through them are called conductors of heat, which do not allow heat to pass through them are called non-conductors or poor conductors.
14. All metals are conductors of heat. Wood, plastics and a piece of cotton are examples of non-conductors. Gases are poor conductors of heat.
15. Some materials which burn on direct flame in the presence of air, are called combustible materials.
16. Materials which get strongly attracted towards the magnet are called magnetic materials. Our earth itself is a huge magnet. Magnetic materials find many uses in electronic devices.
17. Things are grouped together on the basis of properties of materials from which they are made.
18. The tendency of substances to intermix is called diffusion.