Accidentally having extra variable in a controlled experiment is one way to introduce what to an experiment

Looking at this image, what relationship can be drawn from it? the lower the degree of latitude, the lower the degree of temperature there is no relationship between latitude and temperature the higher the degree of latitude, the higher the degree of temperature the lower the degree of latitude, the higher the degree of temperature

What are some natural processes that represent physical and chemical changes?

All phases of matter may have a fixed mass