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Chemical & Physical Properties of Matter

Chemical & Physical Properties of Matter. Chemical Properties. Characteristics that are observed ONLY when a substance changes into a different substance. Chemical Properties. Types of Chemical Properties: Combustible/flammable : able to burn Examples & Facts:

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Chemical & Physical Properties of Matter

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  1. Chemical & Physical Properties of Matter

  2. Chemical Properties • Characteristics that are observed ONLY when a substance changes into a different substance

  3. Chemical Properties • Types of Chemical Properties: • Combustible/flammable: • able to burn • Examples & Facts: • all chemicals come with a label that identifies their level of flammability

  4. Chemical Properties • Types of Chemical Properties: • Combustible/flammable: • able to burn • http://youtu.be/EZ3JT2nWfMA • Examples & Facts: • oxygen & hydrogen are very flammable gases • carbon dioxide is not a very flammable gas

  5. Hay Bale combusting • http://www.youtube.com/watch?v=zRNCrHqD0zE • Stop at 35 seconds

  6. Chemical Properties • Types of Chemical Properties: • Reactivity: • how easily a substance reacts with another substance • http://youtu.be/sS3cIK9jlB8 • Examples & Facts: • many chemicals react with water or oxygen • all chemicals come with a label that identifies their level of reactivity

  7. Chemical Properties • Types of Chemical Properties: • Reactivity: • how easily a substance reacts with another substance • Examples & Facts: • corrosion: slow reaction & wearing away of metals (rusting, tarnishing)

  8. Examples of Chemical Changes

  9. Physical Properties • Characteristics that can be observed without changing the substance into something else

  10. Physical Properties • Types of Physical Properties: • color • texture • odor • taste • hardness • magnetic • boiling, melting, & freezing points

  11. Physical Properties • Types of Physical Properties: • Luster: • shininess or dullness • Examples & Facts: • most metals are shiny • diamonds have a lot of luster • many minerals are dull

  12. Physical Properties • Types of Physical Properties: • Brittleness: • how easily a substance breaks into pieces • Examples & Facts: • very brittle substances may crumble or break with very little force

  13. Physical Properties • Types of Physical Properties: • Brittleness: • how easily a substance breaks into pieces • Examples & Facts: • many rocks & minerals are brittle • chalk is brittle because it crumbles easily

  14. Physical Properties • Types of Physical Properties: • Malleable: • can be pounded into shapes • Examples & Facts: • aluminum is very malleable • clay is also malleable • substances that are malleable are usually not very brittle

  15. Properties Song • http://www.youtube.com/watch?v=uJOGy0dgmUU

  16. Physical Properties • Types of Physical Properties: • Ductile: • can be pulled out into a long wire • Examples & Facts: • substances may be both malleable & ductile • copper is very malleable & ductile • substances that are ductile are usually not very brittle

  17. Physical Properties • Types of Physical Properties: • Conductive: • can transmit heat and/or electricity • Examples & Facts: • a substance may conduct heat, electricity, neither, or both • most metals are good conductors

  18. Physical Properties • Types of Physical Properties: • Conductive: • can transmit heat and/or electricity • Examples & Facts: • pots & pans are made out of metals that are good heat conductors

  19. Physical Properties • Types of Physical Properties: • Soluble: • can be dissolved in a liquid • Examples & Facts: • substances that are “water- soluble” will dissolve in water • salt & sugar are soluble in water • substances that don’t dissolve are “insoluble”

  20. Overview of Physical & Chemical properties • http://youtu.be/oF0lN0jZYx0 • http://www.youtube.com/watch?v=C4pQQQNwy30

  21. Modelsare representations of objects or systems. Models can be used for: • Understanding something • Predicting • Picturing things in your mind • Explain scientific theories

  22. Physical Models • look like the object they model.

  23. Mathematical models • Made up of mathematical equations and data

  24. Conceptual models • Systems of ideas.

  25. Limitation of Models • They don’t act exactly like the things they model or they may not look like the things they represent. Scale might be incorrect. • What is wrong with this model?

  26. Extra information on Chemical & Physical • http://education-portal.com/academy/lesson/matter-physical-and-chemical-properties.html#transcript • Just watch from 1:50 to 4:20 on video

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