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Solid | Definition & Facts | Britannica
State of matter - Wikipedia
States of Matter - Science Notes and Projects
States of Matter: Solid, Liquid, Gas, and Plasma - ThoughtCo
10.6: The Solid State of Matter - Chemistry LibreTexts
Solid-state physics - Wikipedia
States of matter: Definition and phases of change | Live Science
What Is a Solid? Definition and Examples in Science
10.5 The Solid State of Matter - Chemistry - OpenStax
2.1: States of Matter - Chemistry LibreTexts