Term: Quartz, Description: mineral composed of silicon and oxygen atoms in a continuous framework of SiO₄ silicon–oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO₂, Question: Could Quartz be useful to humans if plants died off and there was no oxygen?, Answer:Yes
Fact1: Plants produce oxygen which is needed by humans to survive. Fact2: Quartz is a hard mineral substance made of several elements. Fact3: Quartz is composed of silicon and oxygen. Fact4: Quartz can be melted at high temperatures. 