Mineralogically, silicate minerals are divided according to structure of their silicate anion into the following groups: 1  Nesosilicates (lone tetrahedron) â [SiO4]4â, e.g. olivine. 2  Sorosilicates (double tetrahedra) â [Si2O7]6â, e.g. epidote, melilite group. 3  Cyclosilicates (rings) â [SinO3n]2nâ, e.g. tourmaline group.
BIOTIC VS. ABIOTIC FACTORS. Background Knowledge: An ecosystem is an area in which there are living and non living things. There is more than one kind of ecosystem. Vocabulary. Biotic factors are the living parts of an ecosystem---the animals, plants and microorganisms. Abiotic factors are the non living parts of an ecosystem.
Biotic: humans, corn, flowers, birds, algae, trees, toads, bees, ferns Abiotic: rocks, water, air, concrete, buildings. Abiotic Things. This Site Might Help You.