Streak, color, luster, crystal structure.
When magma<span> cools, </span>crystals<span> form because the solution is super-saturated with respect to some </span>minerals<span>. If the </span>magma<span> cools quickly, the </span>crystals<span> do not have much time to form, so they are very small. If the </span>magma<span> cools slowly, then the </span>crystals<span> have enough time to grow and become large.</span>
<span>The answer is a democracy. In Greek, demos means people, so democracy (or demo.kratia in Greek) means "rule by the people". This form of government dates from about 500 years B.C. when the Athenian leader Cleisthe.nes introduced it. This form of government comprised of three separate institutions: the ekk.lesia, the bou.le, and the d.ikasteria.</span>
