星期一升国旗后，校长通过话筒向全体同学讲话，同学们从高音喇叭聆听到了校长的讲话声音，请用学到的知识解释下面的问题：

短文判断。根据短文内容，在表中相应方框内写正确。

    My friend is Mike. He is a boy. He is tall. He has strong. He has short hair. He is very active and likes sports.

    Amy is his friend. She is a girl. She is short and thin. She has long hair. She is quiet. She likes painting.

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日常生活中发生的下列变化，属于化学变化的是