The troposphere is the lowermost layer of the Earth's atmosphere. Most of the weather phenomena, systems, convection, turbulence and clouds occur in this layer, although some may extend into the lower portion of the stratosphere.
The vibration caused by p waves is a volume changes, alternatimg from compression to expansión in the direction that the waves is traveling.
A plant collects sunlight to form glucose, and your friend proposes an idea for a fan. Conserved = saving
