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States of Matter
Chapter 3 Section 1 Physical Science
Term | Definition |
---|---|
solid | This substance has a definite shape and definite volume |
Liquid | This substance has a definite volume but no shape of its own. |
Fluid | A substance that flows. |
Surface Tension | An inward pull among the molecules of a liquid that brings the molecules on the surface closer together. |
Viscosity | A liquids resistance to flowing. |
Gas | A substance that has no definite shape or volume. |
How do crystalline and amorphous solids differ? | Crystalline solid: particles arranged in a regular, repeating pattern; distinct melting point. Amorphous solid: particles not in a regular pattern; no distinct melting point. |
What property of liquids causes water to form droplets? | Surface tension |
How does breathing demonstrate that gases are fluids? | While you're breathing, gases in the air flow freely through the body and back out again. |
How do the positions and movements of particles a liquid help to explain the shape and volume of the liquid? | Because its particles can move freely around one another, a liquid takes the shape of its container. Because its particles are packed closely together, a liquid has a definite volume. |
What determines the shape and volume of a gas inside a container? | The shape and volume of a gas are the same as those of its container. |