Difficulty: Hard

Average Score: 37%

Which of the following is a true statement about liquid water?

Rationale

It takes the shape of its container.

Liquid water is classified as a fluid, which means it has the ability to flow and will conform to the shape of the container it occupies. This property is a fundamental characteristic of all liquids, including water, allowing it to fill various container shapes while maintaining a constant volume.

A (It is less dense than water vapor.) YOUR ANSWER

This statement is inaccurate; in fact, liquid water is denser than water vapor. Water vapor, being a gas, occupies a larger volume and has lower density compared to liquid water, which is why ice floats on water and why liquid water maintains a higher density than its gaseous state.

B (Its particles are moving slower than those of solid water.) YOUR ANSWER

This statement is incorrect as well. In liquid water, the particles are more mobile and move faster compared to the particles in solid water (ice), where the particles are held in a fixed structure and vibrate in place. The kinetic energy of liquid water particles allows them to slide past each other, resulting in a fluid state.

C (It can be compressed to a significantly smaller volume.) YOUR ANSWER

Liquid water is relatively incompressible compared to gases. While some compression can occur under extreme pressure, it is not significant compared to the compressibility of gases. Therefore, this statement does not accurately describe the behavior of liquid water.

Conclusion

The defining feature of liquid water is its ability to take the shape of its container, a characteristic common to all liquids. This property, along with its higher density compared to water vapor and the faster movement of its molecules compared to solid water, distinguishes liquid water from other states of matter. Understanding these properties is essential in fields ranging from chemistry to environmental science, where water plays a crucial role in various processes.

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