How do scientists test their ideas?

By controlling their experiments to isolate a single variable

air quality

poor drinking water

and heavy polution

can lead to poor health

in chemistry, a solution’s concentration is how much of a dissolvable substance, known as a solute, is mixed with another substance, called the solvent. the standard formula is c = m/v, where c is the concentration, m is the mass of the solute dissolved, and v is the total volume