Report Abuse. Calcium can exist in solid, liquid, or gas form, depending on the temperature. And anything which does not occur naturally is synthetic. The word has nothing to do with elemental properties, as far as I know.twitching_green_grasshopper Â· 7 years ago.olid, liquid and gas are states or phases of an element or substance. But most substances can exist in all three states depending on temperature and pressure.
The basic premise of the telescope tube is to align two lenses the appropriate distance from each other. For this telescope, the lenses are a concave convex (one side curved out and the other curved in) and a plano concave (one flat side and one side curved in). The plano concave lens is used as the eyepiece with the plano (flat) side facing the eye.
Concave or Convex. A convex octagon has no angles pointing inwards. More precisely, no internal angles can be more than 180Â°. When any internal angle is greater than 180Â° it is concave. (Think: concave has a cave in it). convex octagon has no angles pointing inwards. More precisely, no internal angles can be more than 180Â°. When any internal angle is greater than 180Â° it is concave. (Think: concave has a cave in it).