The process of erosion uses weather, water, and plants to break down the ground on earth so that craters become virtually nothing. ... The Earth's gravity is stronger than the moon's, so it attracts more space debris than the moon does.
Primarily because earths' atmosphere disintegrates many meteorites before they reach the Earth. Secondarily because earth's more active tectonic motions delete them
The physical stimulus is the only part of the test that is measureable, and therefore, knowable. The stimulus is our anchor for our estimate of the listener's perception.
