You can't. Popular science articles express the existing scientific knowledge, scientific methods, and scientific ideas and spirits integrated into them through words; Papers are often used to refer to articles that conduct research in various academic fields and describe academic research results. The research scope of popular science articles and papers is different, so popular science articles can't be regarded as papers even if the number of words reaches 2000.

Popular science articles are characterized by being knowledgeable, scientific, practical and concise; The characteristics of this paper are academic, theoretical and scientific.