Tea bags were initially made of soft cloth like silk because it could hold the tea leaves, allow water to pass through, and was strong enough to withstand contact with hot water without falling apart. NCERT Science Textbook Curiosity Science ...
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The choice of filter is determined by the size of the particles that need to be removed. Different materials like cotton, charcoal, or sand are selected based on their ability to capture particles of varying sizes.
Materials such as cotton, charcoal, and sand can be used as filters, depending on the specific requirements for removing particles from a liquid. NCERT Book Curiosity Science Class 6 Class 6 Science NCERT Chapter 9