This claim is a classic scaling analogy that correctly illustrates the vast difference in scale between atoms and macroscopic objects; no citation is needed as it is a matter of basic mathematical proportion.
The claim asks to verify a classic volumetric scaling ratio (the ratio of an apple to the Earth is roughly the same as an atom to an apple). This is a straightforward mathematical proportionality test (powers of ten) common in physics education and everyday observation of scale. Per the instructions, trivially true comparative statements or well-known proportional analogies of this type are classified as COMMON_KNOWLEDGE, requiring no retrieved papers.