#1 The building was more stable when the mass was put on the bottom floor rather then the top because the centre of gravity was down lower and that makes things more sturdy.


#2 The centre of gravity moved to the edge of the building when the mass was moved to the top floors because the building was off balance.


#3 When we moved the mass to the edge of the building on the bottom floor it really unstable because it didn't have a wide enough base to level out the mass and keep it sturdy, but when we put it on the top floors it got more stable because the building was quite balanced through out.


#4 The changes that we could make to are building would be to put more straws on the bottom because a wider base would male it so it wouldn't tip as easily. 


~Liam