1) a) Define Density b) Define Specific Gravity c) Which is a relative value, and which is and absolute? d) Define Atomic weight 2)a) Name 4 methods of finding specific gravity. b) Name an advantage and a disadvantage to each. 3)a) Draw a Direct Reading Specific Gravity Balance and label the parts. b) Give the steps used in using the Direct-Reading SG Balance. 4)For the following elements, chart their name, possible valencies,atomic weight and a gem material they're found in (natural ORsynthetic):Al, Be, K, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, H, O, Si, B, Ca, C, P, Zr. 5) Name 3 factors can influence the specific gravity of a substance? 6)For the following groups of gemstones, chart their chemicalcomposition, specific gravity, hardness, crystal system and commonhabit(s):a) Emerald & Aquamarineb) Ruby & Blue sapphire & Colourless Sapphirec) Rock crystal & Amethyst & Citrine & Chalcedony & Jasperd) Hematite & Pyritee) Jadeite & Nephrite & Serpentinef) Spinel & Synth, Spinelg) Garnets - Pyrope & Almandine & Spessartiteh) Garnets - Uvarovite & Grossular & Andraditei) Diamond, CZ, Synth. Moissonite, YAG, GGG, Synth. Rutile, Strontiumtitanate 7) For the following groups what may account for thedifferences (if any) in specific gravity?a) Emerald & Aquamarineb) Ruby & Blue sapphire & Colourless Sapphirec) Rock crystal & Amethyst & Citrine & Chalcedony & Jasperd) Hematite & Pyritee) Garnets - Pyrope & Almandine & Spessartitef) Diamond, CZ, Synth. Moissonite, YAG, GGG, Synth. Rutile, Strontiumtitanate