10
lesson pretestMultiple Choice

Pretest

Question 10 • Physical Science

Which statement about the physical change of liquid water boiling into steam is true?

Answer
A
The weight lost represents a mass change.
B
The heat added represents an energy change.
C
The steam cannot conserve mass.
D
The action cannot be reversed.

Explanation

Boiling changes water from a liquid to a gas, but it does not change how much water there is when the steam is contained. The added heat is energy transferred to the water, so it represents an energy change. The change can be reversed by cooling the steam until it condenses back into liquid water.

AI-written and checked against the verified answer.