What causes leaves to change color in the autumn? is the change physical or chemical? explain your answer.

The chlorophyll breaks down, the green color disappears, and the yellow to orangecolors become visible and give the leaves part of their fall splendor. At the same time other chemical changes may occur, which form additional colors through the development of red anthocyanin pigments.

The earths atmosphere is made up of nitrogen and oxygensolids turning into gases is called sublimation.