Gerry is looking at salt under a powerful microscope and notices a crystalline structure. what can be known about the salt sample that gerry is looking at

It can be known that the Salt sample is Ionic nature and therefore is showing a Crystalline lattice such as NaCl. It consists of a metal and a non metal it will be soluble in water and would potentially have a high melting point. 

Okay this will take 1 hour okay dont forget me.

The independent variable is the type of music.the dependent variable is the pulse rate.the intervening variable is the age of the subject.if the mother does not like rock, her pulse is likely to not increase.the same might be true for the sister.the friend may like rap and gets excited.to establish cause/effect relationship, all of the subjects must be consistent.hope i .