It would most definitely not be a hill or a cliff. I believe it would be a plain.
They will both hit the ground at the same time because gravitational acceleration for all objects is the same.
Any object, except antimatter, :)
Well, you would reply that that's not what theories are. Theories explain the how and the why, laws explain the what. So, the Big Bang theory isn't "just a theory". It's a theory, it explains the how. (Also, if someone tells you it's anti-God or whatever, tell them the thoery was created by a Catholic scientist. True fact.) I hoped this helped!!! (You don't have the include who created the theory if this is for homework.)
It's cold outside, the water vaper in your breath condenses into tiny droplets of liquid water and ice that you can see.