Any time you cook a pizza, the smell goes through the house and smells really good. This is because the smell spreads through diffusion. Is this a form of active, or passive transport?

Because the earth is not round ,but it may seem round when viewed from ,our planet but true some points earth is not round was an oblate spheroid -a square that it squashed as globe however is not even a perfect oblate spheroid.in fact isaac newton's first proposed that earth was not perfectly round but it was an oblate spheroid instead.that mean a square that is squashed as its poles and swollen at the

Gay-lussac's law i think.