To organize a research paper I would think.
Answer:
Our atmosphere helps protect the earth from collisions with small objects, however, when the atmosphere can't protect it from big objects the effects can go far beyond the crater. any scientists think that the collision that happened between the large space rock and Earth 65 millino years ago may have been the cause for the global destruction that caused teh dinosaurs to go extinct.
In the exposition the plot, background, and characters are introduced.
