Witch type of weathering happens when rock is broken into smaller pieces over time

I would go with ''mechanical weathering'' since that makes rock turn smaller and smaller due to the weather.

The type of weathering would be mechanical weathering 

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