When you add heat energy to a liquid it turns into a __________.
Responses
A gasgas
B solid
C plasma
D gas
The correct answer is A, gas. When heat energy is added to a liquid, the molecules within the liquid gain energy and start to move faster. This increased molecular motion causes the liquid to reach its boiling point, at which the liquid transitions into a gas state. This process is called vaporization or boiling.
To find the answer to this question, you could have recalled your knowledge of the different states of matter and their transitions. In this case, knowing that adding heat energy to a liquid causes it to turn into a gas would lead you to select option A, "gas." Additionally, you could have used prior experience or conducted a simple experiment to observe the process of liquid turning into a gas when heated.