NEET BIOLOGY

Detailed explanation-1: -Formed from viscous lava, perlite is a volcanic glass of rhyolitic composition that contains between 2 and 5 percent water. Most volcanic glasses contain some water, including obsidian (less than 1 percent) and pitchstone (up to 10 percent).

Detailed explanation-2: -Soilless media can be inorganic (e.g. sand, gravel, pebbles, perlite, rock wool, vermiculite), organic (e.g. rice hulls, peat, sawdust, straw, coconut coir) or synthetic (e.g. foam ship, sponges, moisture absorbent plastic fibre).

Detailed explanation-3: -: volcanic glass that has a concentric structure, appears as if composed of concretions, is usually grayish and sometimes spherulitic, and when heated expands to form a lightweight aggregate used especially in concrete and plaster and as a medium for potting plants. perlitic. ˌpər-ˈli-tik. adjective.

Detailed explanation-4: -Perlite is made from a mined volcanic glass of the same name. As a raw material it contains water, trapped by the rapid cooling of lava. The moisture vaporizes explosively when heat is applied.