Answer: congelar el agua.
Explanation: un fenómeno físico se produce cuando el cambio no es muy profundo y no altera la naturaleza química.
Answer:
gravity
Explanation:
gravity pulled the ball down so that's why it hit the ground
I would say, C. Because an controlled variable is an experimental element which is constant and unchanged throughout the course of the investigation.
The product is going to be the solutions after the elements have been mixed. The answer is C because energy comes out as well as water and air.
