Why does Earth's surface have very few impact craters despite its size and gravity?

• A. Geological processes erasing them.
• B. The atmosphere prevents any crater formation.
• C. The Moon shields Earth by gravitational effects.
• D. Earth is younger than the Moon.

Answer: (A)

Earth’s surface shows few impact craters mainly because the planet’s surface is constantly renewed and altered by geological activity. Plate tectonics shuffles and recycles crust, mountains grow and are eroded, and volcanic activity can bury or deform impact features. Over time, wind, water, and ice wear down craters and fill them in with sediment, so older craters disappear from view. The atmosphere does reduce the number of small meteoroids that reach the surface, but it doesn’t prevent crater formation entirely, and larger impacts still create lasting features. The idea that Earth is protected by the Moon or that Earth is younger than the Moon isn’t supported by how craters form and persist. So the main reason few craters remain is the rapid recycling and erosion of Earth’s surface.