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Chapter 15 – Changes in Matter

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Presentation on theme: "Chapter 15 – Changes in Matter"— Presentation transcript:

1 Chapter 15 – Changes in Matter
Section 15-1 SOLIDS, LIQUIDS, & GASES

2 States of Matter Different forms of matter: Solids Liquids Gases
PARTICLES ARE ALWAYS IN MOTION

3 States of Matter State depends on 2 things:
Particle (atoms/molecules) arrangement repeating pattern, in contact, or random Particle motion vibrating, sliding freely, or spread apart in all directions

4 Solid Matter Definite volume, definite shape
Particles packed together tightly Particles in a fixed position, but vibrating Examples: wood, glass, salt, plastic Vibrate in place

5 Types of Solid Matter Crystalline Solid – regular, repeating pattern
Examples - salt, sugar, sand, snow Melts at distinct, characteristic melting point SALT SNOW

6 Types of Solid Matter Amorphous Solid – NOT arranged in a pattern
Examples – plastics, rubber, glass NO distinct melting point (melts over a range), becomes “softer” as it is heated CANDLE GLASS

7 Liquid Matter Sliding, in contact Definite volume, NO definite shape
Particles can move from place to place (slide) Particles attracted to each other, but easily separate Take the shape of the container its put in Examples: milk, oil, water Sliding, in contact

8 Liquid Matter Viscosity – resistance of a liquid to flow
Fluid – a substance that flows HIGH VISCOSITY – flow slow (syrup, honey) LOW VISCOSITY – flow quickly (water, alcohol) LOW HIGH Viscosity Viscosity Note: Earth Science – lava flows can be runny or thick (viscosity)

9 Gas Matter Move freely Examples:
NO definite volume, NO definite shape Particles push outward on container, flying at high speeds Spread to fill container Particles can travel anywhere, until they hit a solid surface Examples: air (breathing in & out), oxygen, water vapor, perfume odor Move freely

10 Summary SHAPE VOLUME

11 Matter matters because it is (almost) everything.
The End! Matter matters because it is (almost) everything.


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