It can take 49 days, I could be wrong. What do you mean in this question?
Not necessarily, rain needs some mechanism such as instability of vertical air movement..
Today, natural sciences<span> are more </span>commonly divided<span> into life </span>sciences<span>, such as botany and zoology; and physical </span>sciences<span>, which include physics, chemistry, geology, astronomy and materials </span>science<span>.</span>
1-Na
2-N
3-F
4-C
5-Ti(i guess)
6-Fe