Chapter 2, Section 1States of Matter

Wednesday, September 30, 2009

Pages 46 -- 50

ObjectivesObjectives

• 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 WordsVocabulary 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?

SolidsSolids• 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.

• 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.

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Types of SolidsTypes 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’dTypes 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.

LiquidsLiquids

• 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.

GasesGases

• 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.

HomeworkHomework

• Workbook 2.1 -- due Friday, October 2.

• Bring in a clean water bottle by Thursday, October 1st!

• Workbook 2.1 -- due Friday, October 2.

• Bring in a clean water bottle by Thursday, October 1st!