Answer: Intensity has to do with how hard the particular exercise is, while time has to do with the duration of time the exercise is performed.
A theory is an educated guess that can be true or false. it's to be corrected during the experiment.
an observation is when you look at something and you notice about the experiment.
Schizophrenia is diagnosed by the presence of symptoms or their precursors for a period of six months. Two or more symptoms, such as hallucinations, delusions, disorganized speech, and grossly disorganized or catatonic behavior, must be significant and last for at least one month.
Mental illness itself occurs from the interaction of multiple genes and other factors -- such as stress, abuse, or a traumatic event -- which can influence, or trigger, an illness in a person who has an inherited susceptibility to it.