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3.5 States of Matter

6th grade science

How do you describe a solid? The fixed, closely packed arrangement of particles causes it to have a definite shape and a volume.
How do you describe a liquid? Because its particles are free to move, it has no definite shape; however, it does have a definite volume.
How do you describe a gas? As particles move, they spread apart filling all the space available. It has neither definite shape or nor definite volume.
Solid has a definite shape and a definite volume.
Crystalline solids The particles form a regular, repeating pattern. Salt, sugar, and snow are examples.
amorphous solids The particles are not arranged in a regular pattern. Glass, plastic, and rubber are examples because they may become softer or change into other substances at distinct temperatures.
liquid has a definite volume but no shape of its own.
fluid a substance that flows; can also be called a liquid
surface tension an inward force, or pull, among the molecules in a liquid that brings the molecules on the surface closer together.
viscosity a liquid's resistance to flowing. Depends on the size,shape, and attraction of its particles. Honey and Water show the differences.
gas a fluid with neither a definite shape nor a definite volume.
pressure the force of its outward push divided by the area of the walls of the container.
Created by: mmrandolph