Primary and secondary air pollutants can co-exist in the atmosphere.

true
false

Chalk is an ionic compound. which is a property of all ionic compounds that makes chalkboard? particularly useful for writing on a a high melting point hardness and brittleness inability to dissolve in water a multicolored appearance

What are the doorways into and out of cells, attached to the membrane, and built in the rough er.

The energy required to vaporize a certain amount of a substance is greater than the amount of energy necessary to raise the temperature of the same amout of that substance by 1 degreee celcius