The independent variable is a variable that is being manipulated or controlled. This is to see how it affects, changes and yields the outcome of the particular stimuli.
The dry ice experiment has an IV of temperature and a DV of melting time.
The electron bit would be 2 and you could colour in 4 boxes:) I had the same question as this and I got it correct
D.The transferring of thermal energy from the sun to the earth!
Yeah...it should be out of your system by then