Quantum Theory is commonly related to Quantum Mechanics, or the physics of sub-atomic particles. Quantum Theory defines the theories or educated ideas behind Quantum Mechanics. I believe this is the answer you are looking for.
Direction. Velocity is a vector that describes both speed and direction, while speed is a scalar that describes only speed regardless of direction.
Over short to medium distance, the shape of a projectile"s path is a PARABOLA.
Earths atmosphere, Temperature, Plant life and Oxygen I guess
