chemicals is a mean of objects & oxygen is a kind of element ->  hydrogen and oxygen are different elements  hydrogen and oxygen are different elements & an acids is a mean of fertilizer -> hydrogen and oxygen are different substances hydrogen and oxygen are different substances  hydrogen and oxygen are different substances & water is a kind of substance -> hydrogen, oxygen, and land are different sent hydrogen, oxygen, and water are different substances  electrical energy is added to water & hydrogen is produced when electrical energy is added to water -> electrical matter standards area to relation from land electrical energy causes hydrogen to form from water  space is produced when electrical matter is added to land & electrical energy is added to water -> electrical energy causes oxygen to form from water electrical energy causes oxygen to form from water  electrical energy causes hydrogen to form from water & electrical matter reflex space to relation from land -> electrical energy causes hydrogen and oxygen to form from water electrical energy causes hydrogen and oxygen to form from water  hydrogen, oxygen, and water are different substances & electrical matter hours oceanic and space to relation from land -> electrical energy causes different substances to form from water electrical energy causes different substances to form from water  electrical energy causes different substances to form from water & physical content effect different sulfide to relation -> electrical energy causes chemical change to the water