Spring Festival is a traditional festival in China. During the Spring Festival, there are fireworks displays in Guangzhou, ice sculpture art in Harbin, and folk artists kneading mud at the temple fair

Spring Festival is a traditional festival in China. During the Spring Festival, there are fireworks displays in Guangzhou, ice sculpture art in Harbin, and folk artists kneading mud at the temple fair in Beijing. B

Test analysis: chemical change refers to the change with new substances, and physical change refers to the change without new substances. The essential difference between chemical change and physical change lies in whether new substances are produced.

A, in the process of making ice sculptures, only the shape of ice changes, and no new substances are produced, which belongs to physical changes;

B, in the process of fireworks, new substances such as sulfur dioxide are produced, which belongs to chemical changes;

C, in the process of kneading clay figurines, only the shape of clay changes, and no new substances are produced, which belongs to physical changes;

D, in the process of cutting window grilles, only the shape and size of the paper have changed, and no new substances are generated, which belongs to physical changes. So choose B.

Comments: This question is not difficult. When you answer, you should analyze whether there are new substances in the process of change. If there is no new substance, it belongs to physical change, and if there is new substance, it belongs to chemical change.