Final answer:
A 200 m diameter meteorite will form a crater that is smaller than a crater formed by an 800 m diameter meteorite, as the size of the crater is typically much larger than the meteorite itself.
Step-by-step explanation:
An impact crater is formed when a meteorite strikes a planet's surface. The size of the crater is typically much larger than the size of the meteorite itself. Given a crater forming by a meteorite of a certain size, a larger meteorite would generally form a larger crater. Therefore, a meteorite with a diameter of 200 m will form a crater that is smaller than a crater formed by a meteorite with a diameter of 800 m.
Examples of impact craters on Earth and their sizes demonstrate this relationship. The noted Arizona Meteor Crater, formed by a meteorite that was approximately 40 meters in diameter, resulted in a crater about 1.2 kilometers across. This indicates that a much larger meteorite would produce a significantly larger crater, given their proportional relationship.