It is supposed to flow through so heterotrophs(like humans etc) can gain energy from plants(autotrophs) which other animals gain energy from them eating each other which follows the food chain. Which keeps the food chain and life in order, by giving energy for work and life to sustain.
As the toy car slides down a ramp, its potential energy was transformed into kinetic energy.
Water is a universal solvent
Answer:
All other things being equal the size of a population will decrease if the death rates exceeds the birthrates...