A scientist conducted an experiment on the amount of TV watched versus peird the size of the person watching TV. He studied 5 different people: each of
whom watched TV in the same room, with the same temperature and
lighting, One watched for 1 hour a day, the other 2 hours, the next 3 and so
on What is a controlled variable in this experiment?"

The controlled variable is the lighting and temperature.

Explanation:

i think its white blood cells

i hope this

other quantities, called derived quantities, are defined in terms of the seven base quantities via a system of quantity equations. the si derived unitsfor these derived quantities are obtained from these equations and the seven si base units.