Group a exercises for a month. group b does not exercise. they measure the amount of weight they gained at the end of the month. what is the independent, dependent, and controlled variable

The independent variable is the exercise.
The dependent variable is the weight they gained.
The controlled variable is the groups, and how long(a month).

Hope it's correct, sorry if it's wrong.

Nonmetals usually react by gaining electrons

Ans. : frostbite is when exposure to cold temperatures causes freezing to the skin or other tissues. it most commonly affects the hands, feet, and face. the longer areas are exposed to cold, typically the worse the frostbite. the water temperature used for rewarming a frostbitten part should be : (102 -105) f degrees.