The lesson “Sorting materials into groups” is about learning how to classify different materials present in your surroundings based on the different properties of the materials. And also you will learn different types of techniques for separating those materials from one another and group them according to their simillarities.
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Sorting Materials Into Groups: Questions And Answers Free PDF Download
The Questions and Answers for the chapter “sorting materials into groups” are provided below.
Students are advised to go through each and every question properly. After completing this chapter students should have the concept and understanding of the following topics:
- Different types of objects/materials and their everyday use
- Properties of materials
- Classification of materials
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Q1. Name five objects which can be made from wood.
Ans: Five objects which can be made from wood are:
- Bullock Cart
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 many objects.
|Tumbler||Glass And Plastics|
|Chair||Wood and Plastics|
|ToyShoes||Plastics, wood and paper|
Q4: State whether the statements given below are true or false.
- Stone is transparent, while glass is opaque. (Fslse)
- 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)
- Salts settled 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 a) Round shapes and other shapes b) Eatables and non-eatables
- Round shapes: basketball, globe, apple and earthen pitcher.
Other Shapes: Water and sugar.
- Eatables: Water, orange, apple, sugar
Non-eatables: Basketball, globe and Earthen pitcher.
Q6. List all items known to you that float on water. Check and see if they will float on oil or kerosene.
|Items that float on water||Items that float on oil or kerosene|
|Paper, Thermocol, Dry leaves, Wax, cork, Dry wood, oil.||Paper, Thermocol, Dry leaves, wax, cork, Plastic, Dry wood.|
Q7. Find the odd one out from the following:
a) Chair, Bed, Table, Baby, Cupboard.
b) Rose, Jasmine, Boat, Marigold, Lotus.
c) Aluminium, Iron, Copper, Silver, Sand
d) Sugar, salt, Sand, Copper Sulphate.
a) The odd one is baby because chairs, beds, tables, and cupboards are non-living things made up of materials like wood and metals whereas a Baby is a living being.
b) The odd one is the Boat because Rose, Jasmine, Marigold, and Lotus are flowers and living objects whereas, a boat is a non-living object made up of wood and metals.
c) The odd one is sand because, iron, copper and silver are metals.
d) The odd one is sand because, sand is not soluble in water but sugar, salt and copper sulphate are soluble in water.
Why do we need to group materials?
Ans: We need to group materials because of the following reasons:
1. For our convenience
2. To locate them easily
3. It helps us to study their properties easily and also observe any pattern in their properties.
What are the properties of materials that help in the sorting of materials?
Ans: The properties of materials that helps in sorting of materials are:
appearance, hardness, solubility, float or sink in water and transparency are some properties of materials that help in sorting of materials.
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 materials and has minute pores through which the liquid flows out.
Give a reason why freshly cut surfaces Of metal like iron, and copper are lustrous (shiny) but
they appear dull with the course Of time.
Ans: It is because of the action of air and moisture on them.
Distinguish between hard materials and soft materials
Hard Materials: Materials which are difficult to compress or scratch are called hard materials.
Example: Stone, Diamond, Coin etc
Soft materials: Materials which can be easily compressed and scratched are called soft materials.
Examples: Cotton, Sponge, Rubber etc.
Ans: Solubility is the ability of a substance that completely disappear or dissolve in
water, or in a solvent.
What are soluble and insoluble substances? Make a table and sort out soluble and
an insoluble substance 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 disappear in water even
after stirring for a long time.
Soluble Substances in water: Salt, Sugar, Honey, Baking soda
Insoluble substances in Water: Sand, Soil, chalk powder, sawdust, Pebbles, wax.
What is the role 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 proper functioning of our body.
When you add mustard oil to water, it forms a separate layer. Why?
Ans: Oil and water are immiscible solutions so, oil does not dissolve in water and forms a separate layer.
Name two gases that dissolve in water and are important for the survival of aquatic plants and animals.
Ans: Oxygen and carbon dioxide.
Define Transparent, opaque and translucent materials.
Ans: Transparent materials: Any substances or materials through which light can pass through and objects can be seen clearly are called transparent materials. Example: Glass, water etc.
Opaque materials: Those materials which light cannot pass through and objects cannot be seen through them are opaque materials. Example: wood, cardboard metal, container etc.
Translucent materials: The materials through which the objects can be seen partially are translucent materials. Examples: oil paper, tinted glass etc.