1 Without its atmosphere, Earth would be a very different planet. 2  Gases in the atmosphere allow plants to photosynthesize and animals and plants to engage in respiration. 3  Water vapor, which is an atmospheric gas, is an essential part of the water cycle. 4  All weather takes place in the atmosphere.
Energy transformation can also be explained in terms of potential energy, the stored energy of a system, which can be converted into kinetic energy, the energy of movement. For example, a roller coaster sitting at the top of a hill is said to have potential energy.
Energy conversion is the transformation of one form of energy into another form. More specifically, the term energy conversion refers to the process through which energy is changed into forms that are useful to humans. For hundreds of years, humans have used an array of devices and systems for this purpose.