When water is changed from a liquid to a gas, which type of change occurs?

• A. Chemical change
• B. Biological change
• C. Nuclear change
• D. Physical change

Answer: (D)

Verified step by step guidance

1. Understand the difference between physical and chemical changes: A physical change affects the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances with different properties.
2. Identify the process described: Changing water from a liquid to a gas is a phase change, specifically evaporation or boiling, which involves a change in the state of matter.
3. Recognize that during this phase change, the molecular structure of water (H\\_2O) remains the same; only the arrangement and energy of the molecules change.
4. Conclude that since no new substances are formed and only the physical state changes, this is a physical change.
5. Note that biological changes involve living organisms and nuclear changes involve changes in the nucleus of atoms, neither of which apply here.