Masks are typically made of layers of non-woven fabric, such as polypropylene. Their role is to filter out airborne particles, including viruses and bacteria, helping to protect both the wearer and others.
Discussion Forum Latest Questions
Nasal hair functions like a filter, trapping dust and particles from the air we breathe. This process is similar to filtration, where particles are separated from a fluid using a filter medium.
Decantation is used instead of filtration when separating liquids from larger, settled solids. It’s ideal for mixtures where solids have settled at the bottom, like separating oil from water or sediment from clear liquids.
Sedimentation separates particles from a liquid by allowing gravity to pull heavier particles down to the bottom. The clearer liquid can then be decanted or removed from above the settled particles.
After sunset, the leaves of certain plants fold or come together, like the sleeping leaves of the amla (Indian gooseberry) tree. Class 6 Science NCERT Chapter 10 Chapter 10 Living Creatures: Exploring their Characteristics