Kate gathered three boxes of the same size made of different materials: glass, clear plastic, and aluminum painted black. she placed them on a window sill in the sun for an hour then measured the warmth of the air in each box. in this experiment, the warmth of the air is a( a. independent variable b. control c. dependent d. constant

I am sure that the answer is C dependent

In the given experiment there are three factors

a) type of material : these are independent of each other so are independent variable

b) time : one hour : we have a fixed time so this a constant

c) warmth of air : it is dependent on the time and also on the material of the boxes taken for keeping the air in sun. Thus answer is "Dependent"

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)

particle   p is an electron and particle q is a neutron