The direction and speed of an object is described by its

Here’s what I found

Velocity would be the quantity(word) which describes both the speed as well as the direction of an object. Velocity is an vector quantity. Velocity of an object is the rate of change of position of the object with respect to time specified along with the direction of motion.

Aphysical change is one that you can put in and remove like a ham sandwich. the stuff you put in there can be changem its not permanet. a chemical change is on that can't be change thats permanet. like when you make a cake and bake it. you can't get those ingredients back.