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8 Cards in this Set
- Front
- Back
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Solid |
The particles that make up a solid are packed very closely together. In addition, each particle is tightly fixed in one position. This fixed, closely packed arrangement of particles causes a solid to have a definite shape and volume. The particles that make up a solid stay in about the same position, but they vibrate in place. Energy is low. |
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Crystalline Solid |
The particles in this kind of solid form a regular, repeating pattern. These patterns create crystals. When a crystalline solid is heated, it melts at a specific temperature. |
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Amorphous Solid |
The particles in this kind of solid are not arranged in a regular pattern. Unlike a crystalline solid, an amorphous solid does not melt at a distinct temperature. Instead, when heated, it may become softer and softer or change into other substances. |
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Liquid |
Has a definite volume but no shape of its own. Without a container, a liquid spreads into a wide, shallow puddle. In general, the particles in a liquid are packed almost as closely as in a solid. However, the particles in a liquid move around one another freely. This is why liquids have no definite shape. Liquids are fluids. Energy is moderate. |
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Fluid |
A substance that flows. |
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Surface Tension |
Surface tension is a property of a liquid and the result of an inward pull among the molecules of a liquid that brings the molecules on the surface closer together. Water molecules attract one another strongly. These attractions cause molecules at the water’s surface to be pulled slightly toward the water molecules beneath the surface. |
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Viscosity |
A liquid’s resistance to flowing. A liquid’s viscosity depends on the size and shape of its particles and the attractions between the particles. Liquids with high viscosity flow slowly. and liquids with a low viscosity flow quickly. |
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Gas |
A gas has neither definite shape nor definite volume. As they move, gas particles spread apart, filling all the space available. If you put a gas in a closed container, the gas particles will either spread apart or be squeezed together as they fill that container. Like a liquid, a gas is a fluid. Energy is high. |
