The statement is true. This is because the chemical formula for a salt compound (a compound is made up of two or more atoms of elements) is NaCl, where Na is Sodium, and Cl is Chlorine. Hope this helps!
Layers of fossils in pillars, the rock covering them is dated and we get an exact time of each layer.
A psychological disorder or a mental disorder is compose of behavioral and psychological symptoms impacting on areas of one's life causing further problems. When a psychiatrist like Dylan works on the causes of the disorder such as chemical imbalances, he is now working on the Biological perspective of the treatment.
That's true. There is little variety among organisms found in pools, pounds and lakes. Despite that fact that many ponds are seasonal, lasting just a couple of month (for exemple sessile pools) while lakes can exist for more than hundred years. Lakes and ponds have limited species diversity because they are often limited from each other and from other water sources like rivers, seas and oceans.
