CBSE Class 6 Science Sorting Materials Into Groups Worksheet Set B

Read and download free pdf of CBSE Class 6 Science Sorting Materials Into Groups Worksheet Set B. Students and teachers of Class 6 Science can get free printable Worksheets for Class 6 Science Chapter 4 Sorting Materials Into Groups in PDF format prepared as per the latest syllabus and examination pattern in your schools. Class 6 students should practice questions and answers given here for Science in Class 6 which will help them to improve your knowledge of all important chapters and its topics. Students should also download free pdf of Class 6 Science Worksheets prepared by school teachers as per the latest NCERT, CBSE, KVS books and syllabus issued this academic year and solve important problems with solutions on daily basis to get more score in school exams and tests

Worksheet for Class 6 Science Chapter 4 Sorting Materials Into Groups

Class 6 Science students should refer to the following printable worksheet in Pdf for Chapter 4 Sorting Materials Into Groups in Class 6. This test paper with questions and answers for Class 6 will be very useful for exams and help you to score good marks

Class 6 Science Worksheet for Chapter 4 Sorting Materials Into Groups

Learning Objectives

1. To learn about materials that are used for making objects
2. To understand grouping and sorting of materials
3. To learn about classification and its importance
4. To understand different properties of materials such as appearance, roughness ,hardness, solubility, transparency ,flotation ,magnetic and conduction property.

We have a number of objects around us like trees, toys, paper, table, chair etc. Some of these objects are living and some are non living. Non living objects can be man–made or natural. Objects around us may have different size,shapes, colours and uses. All objects around us are made up of one or more type of materials such as paper, glass, plastic, cloth,wood, metal, mud, soil, cotton, etc.
An object can be made from different materials. For example, chair can be made from wood or plastic.
Different objects can be made from the same material. For example window panes and fish bowl are made from same material, glass.
Several objects are made up of combination of several materials. For example mango shake is made up of mango, milk, sugar etc.
Different materials have different properties. Many objects differing in usage can be made from the same material. There are so many ways to group objects.
Placing similar things together is called grouping. For example in supermarket grouping is done by keeping similar items on same shelf, which make it easier for us to find the item we need.

CLASSIFICATION
The process of sorting and grouping objects/things according to some basis is called Classification. It makes the study of objects more easier, simple, systematic and convenient.

PROPERTIES OF MATERIALS
Different types of materials have different properties.Some of the important properties of materials are given below :

Appearance
In appearance materials usually look very different from each other. The appearance of wood is different from iron. Similarly appearance of iron is different from copper or aluminum. Some materials when freshly cut appear shiny whereas others have no shine Metals shine in their pure state.This shining property of metal is called metallic lustre.
Some materials having lustre are iron, copper, aluminum, gold, silver, etc.
Materials can be classified on the basis of their luster as lustrous materials ,for example gold,silver etc and non lustrous materials for example wood,plastic, stone etc.
Shining property of gold,copper and silver is used for making jewellery. Some metals often loose their shine when exposed to air and moisture for some time.

Hardness

Hardness: On the basis of hardness materials can be classified as soft or hard. Soft materials are those which can be easily compressed or scratched e.g. cotton, sponge Hard materials are those which are difficult to compress e.g. iron, stone, wood, diamond, etc.
We can identify soft or hard materials by pressing different materials with our hand.Hard materials cannot be compressed easily while soft materials can be easily compressed. Talc ,that is used for making talcum powder is a very soft substance.

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Wood and diamond are examples of hard substance.

Roughness
Materials can be rough or soft. If a material has bumps or ridges on its surface which can be felt by touching them ,such materials are said to be rough . For example rocks ,bark of a tree,brick etc are rough materials.Smooth materials do not have bumps.For example window pane,cup,plates, mirror etc.

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Solubility
An important property of water is its ability to dissolve many substance in it. Many of the solid ,liquid and gases dissolve in water.

Solubility of solids in water: Some of the solid substances dissolve when placed in a container containing water and stirred. Whereas some remain undissolved.
The solid substances that dissolve in water are called soluble substances e.g. salt, sugar etc.
The solid substances that remain undissolved are called insoluble substances. e.g. sand, saw dust etc.

Solubility of liquids in water : When liquids are mixed with water, Some get completely mixed and known as miscible e.g. vinegar, lemon juice Some do not mix and form a separate layer are known as immiscible substances e.g. mustard oil, coconut oil, kerosene etc.

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Do you Know : Animals living in water breathe the oxygen dissolved in water. Water plants use the carbon dioxide dissolved in water for photosynthesis.

Solubility of gases in water: Some gases are soluble in water e.g. hydrogen chloride gas, carbon dioxide gas, ammonia gas etc. Some gases are insoluble in water e.g. nitrogen, hydrogen etc. Water, usually, has small quantities of some gases dissolved in it e.g. oxygen dissolved in water is very important for the survival of animals and plants that live in water. Lemonade and other carbonated drinks are examples of gas dissolving in water as these drinks contain carbon dioxide gas dissolved in water.

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Do you Know : Archimedes, a Greek physicist of the third century BC, discovered the principle of flotation known as Archimedes principle. According to the principle, when a body is wholly or partially immersed in a fluid there is an up thrust which is equal to the weight of fluid displaced.

Flotation
Some materials when dropped in water float on its surface e.g. dried leaves, dry wood, feather etc.
Some materials when dropped in water sink in water e.g. stone, iron nail etc.
The concept of flotation or sink can be understand by taking following example.
When a stone is placed in water, the water level rises. In this case, water is said to be displaced (moved somewhere else) by the stone. If the weight of this displaced water is greater than the weight of the stone, the stone will float; otherwise it will sink.
The shape of an object also affects the amount of liquid it would displace. Certain heavy objects are also able to float because of their shape. For example, the shape of a ship allows it to float on water, despite the fact that it is very heavy.

Archimedes, a Greek physicist of the third century BC, discovered the principle of flotation known as Archimedes principle. According to the principle, when a body is wholly or partially immersed in a fluid there is an up thrust which is equal to the weight of fluid displaced.

Transparency
On the basis of transparency the objects can be divided as follows:
Transparent objects are those objects through which things can be seen (i.e. they allow the light to pass through them) e.g. glass, water, air, some plastics etc.
Shopkeeper mostly keep sweets ,biscuits etc. in transparent container so that customer can select item of their choice. Air is transparent that is why we are able to see things around us ,even though air is all around us .Clean water is also transparent.
Opaque objects are those objects through which you are not able to see (i.e. they do not allow the light to pass through them) e.g. metals, cardboard, wood etc.

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Translucent materials are those materials through which objects can be seen but not clearly e.g. oiled paper.

SOME OTHER PROPERTIES OF MATERIALS
Magnetic Properties
Materials that are attracted to a magnet are called magnetic materials.For example iron and steel are magnetic material. Nickel and cobalt are also attracted towards magnet. Aluminum, gold, wood, plastic etc. are not attracted towards magnet these are called non magnetic materials. Magnetic property of iron is used in doors of almirahs, refrigerators and various electronic devices.

Conduction of Heat
Utensils kept in kitchen are usually made up of metals and their handles are made up of plastic or wood. This is because metals get heated whereas materials such as wood and plastic do not.
Materials that allow heat to flow through them are called good conductors of heat, for example metals whereas those that do not allow heat to flow through them are bad conductors of heat. For example paper, wood, plastic and glass are bad conductor of heat.


Multiple Choice Questions

Question. Which of the following acts as a translucent medium ?
(a) water
(b) alcohol
(c) muddy water
(d) All of these
Answer : C

Question. Which of the following is an example of solubility of gas in water?
(a) Oxygen in air
(b) Oxygen in ocean
(c) Cold drink
(b) Both (b) and (c)
Answer : B

Question. Choose odd from the following.
(a) Clear water
(b) Window pane
(c) Newspaper
(d) Glass container
Answer : C

Question. What is the application of carbon dioxide dissolved in water?
(a) Important for photosynthesis of aquatic plants.
(b) Important for aquatic animals.
(c) Not important as it causes global warming 
(d) Important for growth of fishes.
Answer : A

Question. Mahesh and Rohan got a chance to visit a ship but Mahesh was afraid to go on ship. He said that ship being heavier in weight will sink in the water but Rohan said it will float on water With whom do you agree and why?
(a) Mahesh as ship is heavy in weight.
(b) Rohan as ship is light in weight.
(c) Rohan, because ship floats because of its shape
(d) Mahesh as ship can’t bear weight of the people on it.
Answer : C

Question. Which pair of substance float in water?
(a) Pin, oil drops
(b) Coin, rubber band
(c) Plastic ball, feather
(d) Iron nail, cotton thread
Answer : 

Question. Which of the following is insoluble in water?
(a) Tooth paste
(b) Washing powder
(c) Chalk powder
(d) Baking powder
Answer : C

Question. Washing powder on stirring disappear in water this is due to
(a) Solubility
(b) Transparency
(c) Conduction
(d) Magnetic property
Answer : A

 

Question. Read the following statements and choose the incorrect statements.
(a) A paper weight is hard. It therefore sinks in water.
(b) Cotton is soft. It can be compressed easily.
(c) Butter paper in transparent. Things can be clearly seen through it.
(d) All are correct.
Answer : C

Question. Which type of material is used to make wind screen of a car?
(a) Transparent
(b) Translucent
(c) Opaque
(d) All of these
Answer : A

 

Question. Rubber is used in making Wellington boots because it
(a) is water proof
(b) is opaque
(c) floats
(d) is soft
Answer : A

Question. Can we look through the oil spread paper towards the light bulb?
(a) Yes, oil spread paper becomes transparent
(b) No, oil spread paper is opaque
(c) Yes but not clearly as, oil spread paper becomes translucent
(d) Yes, because oil spread paper has hole in it.
Answer : C

Question. Handles of utensils that are made up of metals become hot on cooking. This is due to
(a) Transparency
(b) Conduction
(c) Hardness
(d) Rough surface
Answer : B

Question. Complete the following analogy by choosing the correct option
Lustre : gold : jewellery :: _________ : metals : utensils
(a) magnetic
(b) conduction of heat
(c) opaque
(d) rough
Answer : B

 

Ch-4. Sorting Materials into Groups

Fill in the blanks

1. Objects are made up of large variety of ________________.

2. Tumblers are made with materials that can hold ___________________.

3. Materials that have lustre are usually called as ____________________.

4. Three examples of metals are ____________,_____________& ________________.

5. The gas which can dissolve in water is _________________.

6. Materials are grouped together on the basis of ___________ and _____________ in their properties.

7. Some metals lose their shine and often look dull because of the action of ______ and ________________ on them.

8. Based upon transparency, materials can be grouped as _____________, _______ and ______________.

Name the following:

1. Two liquids soluble in water

2. Two liquids insoluble in water

3. Two transparent objects

4. Two translucent objects

5. Two opaque objects

6. Two solids soluble in water

Write true or false :

1. Stones and nails float on water.

2. Cotton is soft while iron is hard.

3. We choose a material to make an object depending on its properties and the purpose for usage.

Define the following:

1. Transparent materials 2. Translucent materials 3. Opaque materials

Distinguish between soluble and insoluble substances.

Answer the following questions:

1. Why do we need to group materials?

2. Name any four properties that can be used for sorting materials.

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