TeXes Science Practice Test

Which component of the Moon creates the "man in the moon" effect?

1. Maria

2. Craters

3. Rilles

4. Ejecta

The correct answer is: Maria

The "man in the moon" effect is primarily created by the darker, flat regions of the Moon's surface known as the maria. These large basaltic plains were formed by ancient volcanic eruptions and are less reflective than the surrounding highlands, which contain more craters and rugged terrain. The contrast between the lighter highlands and the darker maria contributes to the perceived facial features that resemble a figure on the Moon's surface. The maria's specific arrangement creates the visual illusion that many people recognize as the "man in the moon." In comparison, craters are small depressions caused by impacts and do not have the same effect because they are lighter and more numerous, adding detail but not forming a cohesive image. Rilles are long, narrow depressions that typically resemble channels and also do not contribute to the "man in the moon" imagery. Ejecta, the material expelled during impacts, can create additional surface features but again does not create the recognizable pattern seen in the maria. Hence, the darker maria are the predominant feature that creates the iconic "man in the moon" effect.