Acoral reef ecosystem might include all of the following organisms: phytoplankton, clams, octopus, moray eel and barracuda. the following shows a basic food chain of these organisms:
basic food chain
in this food chain, which organism would be the primary producer?

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.