Chapter 2, Section 1 States of Matter Wednesday, September 30, 2009 Pages Wednesday, September 30, 2009 Pages

Objectives Define and differentiate solids, liquids, and gases in terms of shape and volume. Compare the particle motion in solids, liquids, and gases. Define and differentiate solids, liquids, and gases in terms of shape and volume. Compare the particle motion in solids, liquids, and gases.

Vocabulary Words Solid Crystalline solid Melting point Amorphous solid Liquid Viscosity Gas Solid Crystalline solid Melting point Amorphous solid Liquid Viscosity Gas

What are solids, liquids, and gases?

Solids A solid has a definite shape and definite volume. An object would not change its size or shape as you move it from place to place. The particles in a solid are packed tightly together in stay in a fixed position.

Types of Solids In most solids, the particles form a regular, repeating pattern. Patterns create crystals. Solids that are form from crystals are called crystalline solids. Crystalline solids have a distinct melting point. Examples include salt, sugar, sand, and snow. In most solids, the particles form a regular, repeating pattern. Patterns create crystals. Solids that are form from crystals are called crystalline solids. Crystalline solids have a distinct melting point. Examples include salt, sugar, sand, and snow.

Types of Solids -- Cont’d Some solids are not arranged in a regular pattern. These solids are called amorphous solids. Amorphous solids do not have a distinct melting point. Examples include rubber, plastics, and glass. Some solids are not arranged in a regular pattern. These solids are called amorphous solids. Amorphous solids do not have a distinct melting point. Examples include rubber, plastics, and glass.

Liquids Liquid has no shape of its own. Liquid takes the shape of its container. The particles in liquid are free to move around. The resistance of liquid flowing from place to place is called viscosity. Liquid has no shape of its own. Liquid takes the shape of its container. The particles in liquid are free to move around. The resistance of liquid flowing from place to place is called viscosity.

Gases A gas can change volume very easily. Gas particles move very fast and easily spread apart and fills all the available space. A gas has neither definite shape nor volume. A gas can change volume very easily. Gas particles move very fast and easily spread apart and fills all the available space. A gas has neither definite shape nor volume.

Homework Workbook due Friday, October 2. Bring in a clean water bottle by Thursday, October 1st! Workbook due Friday, October 2. Bring in a clean water bottle by Thursday, October 1st!