Final answer:
A spotting of a 'crater' refers to the lasting impression made by a meteor impact on Earth's surface, such as the Ouarkziz Impact Crater and the Tunguska event, providing evidence of the collision of interplanetary debris with our planet.
Step-by-step explanation:
A spotting of a crater is a round not observed but known to have impacted. For example, the Ouarkziz Impact Crater in Algeria is a physical geographical feature resulting from a historic meteor impact during the Cretaceous period. This event underscores the reality that the collision of interplanetary debris with Earth is not just theoretical; it's an ongoing process with concrete evidence visible on the planet's surface. The Tunguska event near the Tunguska River in Siberia is another well-documented instance where a large explosion in the atmosphere considerably affected the landscape, killing animals and causing significant forest destruction. Tracking and studying these events help us understand the potential risks from future impacts by asteroids and comets.