Question

pregunta 11 (1 punto)
(01.05 hc)
in science class, the teacher, mr. phillips, melts an ice cube as a demonstration. jimmy states that he believes this is an example of a physical change.
which of the following best explains if jimmys claim is correct or incorrect?
a. this is correct because the ice has changed its composition.
b. this is correct because the ice only changed phases, not composition.
c. this is incorrect because the ice has changed its composition.
d. this is incorrect because the ice only changed phases, not composition.

Explanation:

Un cambio físico es aquél en el que la sustancia no cambia su composición química, solo su estado físico (sólido, líquido, gaseoso). En este caso, el hielo (sólido) se derrite y pasa a ser agua (líquido), pero la composición (H₂O) no cambia. Entonces, Jimmy tiene razón al decir que es un cambio físico.

Answer:

B. This is correct because the ice only changed phases, not composition.