Here's A NEW one for ya!

no it is losing weight everyday

probably, maybe shit like asteroids or whatever. Cant see how it can lose weight considering the law of conservation of mass

no it always stays the same, as weight never leaves the earth but only redistributes

it actually does gain around 40k metric tons a year

i think so

Interesting question since the earth is not a star that needs to burn helium and other chemicals.

Answer here

http://www.seed.slb.com/v2/FAQView.cfm?ID=1099

In plant-eating vertebrates, the main function of the appendix is to help digest a largely herbivorous diet.
The appendix is (assumably) a vestigial organ left behind from a plant-eating ancestor.