Answer: Even though there are smalll amounts of these gases, they can have a major effect on Earth. For example, increased amounts of carbon dioxide are having a major effect on global warming. :)
If there was more than one planet on each orbit, eventually they would collide with each other.
It was kind of a stressful situation because it had as for me to write in black ink and if I would have messed up I would have to do it over again and it had a weird organizational pattern because it would start with your weakness then strengths in on spot and ask for it the other way around in other spot