Certified Hyperbaric Technologist Practice Test 2026 – Comprehensive Exam Prep

Question: 1 / 625

What is the characteristic of matter in the gas phase?

Definite shape and volume

Fixed position of particles

Atoms or molecules move randomly

In the gas phase, matter exhibits a characteristic where atoms or molecules move randomly. This randomness is a direct result of the significant amount of energy that the particles possess, allowing them to overcome intermolecular forces that would otherwise hold them in a fixed position. As a result, gas particles are not bound to any specific location and can spread out to fill their container completely, leading to a lack of definite shape and volume.

This movement contrasts with solids, where particles maintain a fixed position and vibrate in place, and liquids, where particles are close together but can slide past each other. Additionally, gases typically have much lower densities compared to solids and liquids, further highlighting their unique state. Overall, the ability for gas particles to move freely and randomly is fundamental to the behavior and properties of gases.

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High density compared to solids

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