Re: Shingle Color Choice. Just some additional food for thought from the FSEC. This is just one paragraph out of a 67 page report. I disagree with the final findings of this labratory approach method of determining heat gain or loss dependant upon shingle color alone.
Definition of concrete. 1 : naming a real thing or class of things the word poem is concrete, poetry is abstract. 2 : formed by coalition of particles into one solid mass. 3a : characterized by or belonging to immediate experience of actual things or eventsb : specific, particular a concrete proposalc : real, tangible concrete evidence.
Extraneous variables are defined as any variable other than the independent and dependent variable. Control variables are variables that are kept the same in each trial. Lastly, the moderator variables are variables that increase or decrease the relationship between the independent and dependent variable.