1. Smaller chunks of asteroids are sent hurling toward Earth much more frequently than larger chunks of asteroids. Why? 2. Why are meteorites so much more easily found in Antarctica than in other...

1. Smaller chunks of asteroids are sent hurling toward Earth much more frequently than larger chunks of asteroids. Why?

2. Why are meteorites so much more easily found in Antarctica than in other continents?

3. A meteor is visible only once, but a comet may be visible at regular intervals throughout its lifetime. Why?