Physical and Chemical Properties and Changes

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Physical and Chemical Properties and Changes
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Physical Properties

• Characteristics of a material that you can
  observe without changing the substances that make
  up the material
• A PHYSICAL DESCRIPTION

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Example

• What are the physical properties of a pumpkin?
  (Physically Describe the Pumpkin)
• Color Orange
• Shape Round
• Odor Smell it
• Taste Yum
• Texture - Touch
• Mass Weigh it
• Dimensions Measure it
• Density Mass/Volume

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Lets Ponder!!!!

• If a physical property is a physical description
  of an object, what is a physical change

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Physical Change

• A change in the 1. SIZE
• 2. SHAPE
• 3. STATE OF
  MATTER
• Although the physical characteristics of the
  substance have changed, chemically it is still
  the same substance

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Example

• H2O

Solid
Gas
Liquid
It is all still H2O
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Example

• Paper Demonstration
• Salt Water Demonstration

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Chemical Properties

• A characteristic of a substance that indicates
  whether it can undergo a specific chemical change

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In English Please!!!!

• Properties that can alter or change matter into
  something different
• Examples 1. Flammability
• 2. Explosive
• 3. Light Sensitive

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Chemical Change

• A change of one substance in a material to a
  different substance or the creation of an
  additional substance

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Example

• Nail Water
• Nail is made of iron (physical property)
• Iron when exposed to water and oxygen oxidizes
  (chemical property)
• This means it rusts!!!!
• Your nail is now iron oxide

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Demonstration

• Vinegar and Baking Soda
• Exploding Balloon

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Evidence of Chemical Changes

• Fire/Burning
• Bubbling/Gas production
• Temperature Change without heating/cooling
• Change in Color
• Change in Odor
• Forms a precipitate

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Conclusion

• Matter can undergo physical and/or chemical
  changes
• Physical Changes alter the physical make up of
  the matter
• Chemical Change changes or creates a new
  substance
• Physical Property Physical description
• Chemical Property Properties that determine how
  a substance behaves