The chapter “Sorting Materials into Groups” helps students understand how and why we classify materials based on their properties. It introduces key properties like hardness, transparency, solubility, and magnetism, helping students recognize the differences and similarities among various materials. The chapter also explains how materials can be grouped for better understanding and study.
Learning Objectives
Important Terms and Definitions:
- Material: The substance or matter from which objects are made, such as wood, metal, or plastic.
- Properties: Characteristics of a material, such as hardness, transparency, and solubility, are used to identify and classify materials.
- Classification: Grouping materials based on shared properties or characteristics.
- Transparent: Materials that allow light to pass through clearly, like glass.
- Opaque: Materials that do not allow light to pass through, like wood or metal.
- Lustrous: Materials that have a shiny surface, such as metals like gold or silver.
- Hardness: A property that describes how resistant a material is to being scratched or deformed.
- Soluble: A material that can dissolve in a liquid, like salt in water.
- Insoluble: A material that does not dissolve in a liquid, like sand in water.
- Magnetic Materials: Materials that are attracted to magnets, such as iron and steel.
BOSEM solutions for Sorting Materials into Groups
Unlock a clear understanding of material classification with detailed Questions and Answers from the BOSEM Class 6 Science chapter ‘Sorting Materials into Groups,’ focusing on key concepts and properties.
Q1. Name five objects which can be made from wood.
Ans: Chair, table, bed, bullock cart, plough.
Q2. Select those objects from the following that shine.
Glass bowl, Plastic toy, Steel spoon, cotton shirt.
Ans: 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 man objects.
Ans:
| Objects | Materials |
|---|---|
| Book | Paper |
| Tumbler | Glass and plastics |
| Chair | Wood and plastics |
| Toy | Plastics, wood and paper |
| Shoes | Leather |
Q4. State whether the statements given below are true or false.
- Stone is transparent, while glass is opaque. (False)
- A notebook has lustre while an eraser does not. (False)
- Chalk dissolves in water. (False)
- A piece of wood floats on water. (True)
- Sugar does not dissolve in water. (False)
- Oil mixes with water. (False)
- Sand settles down in the water. (True)
- Vinegar dissolves in water. (True).
Q5. Given below are the names of some objects and materials.
water, basketball, orange, sugar, globe, apple and earthen pitcher. Group them as
1. Round shape and other shape
2. Eatables and non-eatables.
Ans:
| Round shaped | Other shapes |
|---|---|
| Basketball, orange, globe, apple, earthen pitcher. | Water and sugar |
| Eatables | Non-eatables |
|---|---|
| Water, Orange, Apple, Sugar | Basketball, Globe an Earthen pitcher |
Q6. List all items known to you that float on water. Check and see if they will float on oil or kerosene.
Ans:
| Items that float on water | items that float on oil or kerosene |
|---|---|
| Paper, Thermocol, dry leaves, wax, cork, plastic, dry wood, oil. | Paper, Thermocol, Dry leaves, wax, cork, plastic, Dry wood. |
Q7. Find the odd one out from the following.
- Chari, Bed, Table, Baby, Cupboard.
- Rose, Jasmine, Boat, Marigold, Lotus.
- Aluminium, Iron, Copper, Silver, Sand.
- Sugar, Salt, Sand, Copper sulphate.
Ans:
- The odd one is Baby Because chairs, beds, tables, and cupboards are non-living things made up of materials like wood and metals whereas Baby is a living being.
- The odd one is the Boat because Roses, jasmine, marigolds, and lotus are flowers and living objects whereas the Boat is a non-living object made up of wood and metals.
- The odd one is sand because Aluminium, iron, copper and silver are metals.
- The odd one is sand because sand is not soluble in water but sugar, salt, and copper sulphate are soluble in water.
Sorting Materials into Groups Extra Questions and Answers:
Q1. Why do we need to group materials?
Ans: Sorting of materials is important because of the following reasons:
a. For our convenience.
b. To locate them easily.
c. It helps us to study their properties easily and also observe any pattern in their properties.
Q2. What are the properties of materials that help in the sorting of materials?
Ans: Appearance, Hardness, Solubility, Float or Sink in water, and Transparency are some properties of materials that help in sorting of materials.
Q3. Why a tumbler is not made with a piece of cloth?
Ans: A tumbler is not made with a piece of cloth because the cloth cannot hold water as it is a soft material and has minute pores through which the liquid flows.
Q4. Give a reason why freshly cut surfaces of metals like iron, and copper are lustrous (shiny) but they appear dull with time.
Ans: It is because of the action of air and moisture on them.
Q5. Distinguish between hard materials and soft materials.
| Hard Materials | Soft Materials |
|---|---|
| Materials which are difficult to compress or scratch are called hard materials. | Materials which can be easily compressed and scratched are called soft materials. |
| Examples: Stone, Diamond, Coin, Glass, etc. | Examples: Cotton, Sponge, Rubber, etc. |
Q6. Define solubility.
Ans: Solubility is the ability of a substance that can completely disappear or dissolve in water, or in a solvent.
Q7. What are soluble and insoluble substances? Make a table and sort out soluble and insoluble substances listed below:
- Salt, Sugar, Sand, Chalk Powder, Sawdust, Pebbles, Honey, Baking Soda, Wax, Soil
Ans: Soluble substances are substances that are completely dissolved in water, whereas insoluble substances are substances that do not dissolve or do not disappear in water even after stirring for a long time.
| Soluble substances in water | Insoluble substances in water |
|---|---|
| Salt, Sugar, Honey, Baking soda | Sand, Soil, Chalk powder, Sawdust, Pebbles, Wax |
Q8. Write the roles of water in our body.
Ans: On average, 60-70% of our body is made up of water and it can dissolve a large number of substances and help in the functioning of our body.
Q9. Name two gases that are dissolved in water and are important for the survival of aquatic plants and animals.
Ans: Oxygen and Carbon dioxide.
Q10. When you ass mustard oil in water, it forms a separate layer, why?
Ans: Oil and water are immiscible solutions so oil does not dissolve in water and form a separate layer.
Q11. Define the following terms.
1. Transparent materials
2. Opaque materials
3. Translucent materials.
Ans:
- Transparent materials: Any materials through which the light can pass and the object can be seen clearly are called transparent materials.
Glass, water etc are examples. - Opaque materials: Opaque materials are the materials which light cannot pass through and object cannot be seen through them.
Wooden box, cardboard, metal container etc. - Translucent materials: The materials through which the objects can be seen but not clearly.
Examples are oil paper, wax paper, coloured glasses etc.
