The analysis process is as follows:
A, what is made is a change in shape, and no new substance is produced, which belongs to physical change.
B, there is no new substance generated in the process of turning stone into gold, which belongs to physical changes.
C, the spring breeze is green in Jiang Nanan, and the bright moon shines on me. No new substances are generated in the process, which belongs to physical changes.
D. In the process of draining the wick by candles every night, new substances such as carbon dioxide will be produced, which is a chemical change. (burning)
Extended data:
Chemical changes are always accompanied by physical changes. In the process of chemical change, there are usually luminescence, exothermic and endothermic phenomena. According to the atomic collision theory, the chemical changes between molecules are completed by collision, and the molecules that need to complete the collision reaction need to meet two conditions: (1) has enough energy; (2) the correct orientation.
Because the reaction needs to overcome a certain molecular energy barrier, it must have higher energy to overcome the molecular energy barrier. Two colliding molecules must have the right direction to break the broken bond.
References:
Baidu encyclopedia-chemical changes