Hello, Students for your better preparation for CBSE CLASS 6 here we are sharing the complete solution of NCERT CLASS 6 Science Chapter 5 Separation of Substances – with Complete explanation, Summary, NCERT CLASS 6 Science Short Answer Questions, NCERT CLASS 6 Science Long Answers, NCERT CLASS 6 Science MCQS, NCERT CLASS 6 Science mind maps.
NCERT Class 6 Science “Separation of Substances”
This chapter introduces students to the concept of separating different substances from a mixture. It explains the various methods used to separate components of a mixture based on their physical properties. The main topics covered in this chapter include:
Mixtures and their types: The chapter begins by explaining what mixtures are and introduces the concept of heterogeneous and homogeneous mixtures. Examples of common mixtures are provided to help students understand the concept better.
Handpicking: This method involves manually picking out the larger particles from a mixture. It is suitable for separating substances that are visibly distinct, such as separating stones from grains.
Threshing and Winnowing: These are methods used to separate grains from chaff (husk) during the process of harvesting and processing crops. Threshing involves beating or pounding the harvested crop to separate grains, while winnowing involves using wind to blow away the lighter chaff, leaving the heavier grains behind.
Sieving: Sieving is the process of using a sieve or a mesh to separate particles of different sizes from a mixture. This method is commonly used in households for separating flour from impurities.
Sedimentation and Decantation: Students learn how heavier particles in a mixture settle down over time due to gravity, resulting in sedimentation. Decantation involves carefully pouring off the clear liquid from the top without disturbing the settled particles at the bottom.
Filtration: Filtration is the process of using a filter to separate solid particles from a liquid. It is commonly used to separate substances like sand from water.
Evaporation: This method involves heating a mixture to allow the liquid component to evaporate, leaving behind the solid component. Evaporation is often used to separate dissolved solids from a solution.
Condensation: Students learn how cooling a vapor can lead to the conversion of the vapor back into a liquid. This process is explained in the context of separating substances from a mixture.
The chapter emphasizes the importance of these separation methods in various real-life situations and day-to-day activities. It also encourages critical thinking by prompting students to consider which method is suitable for separating different types of mixtures based on their properties. Practical examples and activities are provided throughout the chapter to engage students and help them understand the concepts better.