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.
Physical change , the states are changing from liquid to gas
Answer:
a thermos bottle uses a vacuum to keep heat in the thermos.
According to the kmt pressure is directly proportional to the number of collision between particles
