what you understand in chapter sorting material into groups?
Answers
Explanation:
There is a vast variety of objects everywhere.
All objects around us are made up of one or more materials.
A thing can be made of different materials.
Many things can be made from the same material.
Classification: The process of sorting and grouping things according to some basis is’called classification.
Basis of grouping: We can group materials on the basis of the similarities and differences in their properties.
Each material has its own properties, that may differ from others. However, some properties may be common to one or more materials.
Uses of a material: Uses of a material depend on its properties and the purpose for which it has to be used
Metals have lustre while non-metals generally have no lustre.
Smooth and rough surface: Some materials feel smooth when touched e.g., mirror and things made of metals; whereas, some other materials feel rough when touched; for example, a piece of stone.
Hardness and softness: Materials which can be pressed easily are called soft while some other materials which cannot be pressed are called hard; for example, cotton is soft while wood is hard.
Solubility
Soluble substances: Substances that get dissolved in water are called soluble substances.
Insoluble substances: Substances which do not dissolve in water are called insoluble substances.
Miscible: Those liquids which mix well with water are said to be miscible.
Immiscible: Substances which do not mix well with water are called immiscible.
Solubility of gases: Solubility of gases in water is very less.
Oxygen gas which is dissolved in water, is very important for the survival of aquatic plants and animals.
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