In solids, particles are tightly packed and vibrate in place, giving them a fixed shape. In gases, particles are far apart, move freely and spread out to fill space. This explains why solids are rigid and gases are fluid.
Class 8 Science Curiosity Textbook Chapter 1 Exploring the Investigative World of Science question answer
Class 8 Science Curiosity Grade 8 Chapter 1 Exploring the Investigative World of Science solutions
Particles in solid materials are closely packed and arranged in a fixed pattern. They vibrate but do not move freely, giving solids a definite shape and volume. In contrast, particles in gases are far apart and move quickly in all directions. This free movement allows gases to expand and fill any container. Understanding these differences helps explain why solids are firm, liquids flow and gases spread out—important for understanding states of matter and their behavior.
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