5. Solar energy, tidal energy, geothermal energy, and biomass 'are
unreliable sources of energy
politically divisive sources of energy
sources of energy that will not run out
sources of energy that we do not know how to use

frogs. the lower the ph the higher the acid content. frogs have the highest tolerance in this scenario.

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.

i got you i did it ya know what it is just needing to fill this in for a quick task!