2. Physical and Chemical Properties and Changes

3. Physical Properties Characteristics of a material that you can observe without changing the substances that make up the material Characteristics of a material that you can observe without changing the substances that make up the material A PHYSICAL DESCRIPTION A PHYSICAL DESCRIPTION

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

5. Let’s Ponder!!!! If a physical property is a physical description of an object, what is a physical change If a physical property is a physical description of an object, what is a physical change

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

7. Example H 2 O H 2 O Solid Liquid Gas It is all still H 2 O

8. Example: Paper Demonstration Paper Demonstration Salt Water Demonstration Salt Water Demonstration

9. Chemical Properties A characteristic of a substance that indicates whether it can undergo a specific chemical change A characteristic of a substance that indicates whether it can undergo a specific chemical change

10. In English Please!!!! Properties that can alter or change matter into something different Properties that can alter or change matter into something different Examples: 1. Flammability Examples: 1. Flammability 2. Explosive 2. Explosive 3. Light Sensitive 3. Light Sensitive

11. Chemical Change A change of one substance in a material to a different substance or the creation of an additional substance A change of one substance in a material to a different substance or the creation of an additional substance

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

13. Demonstration Vinegar and Baking Soda Vinegar and Baking Soda Exploding Balloon Exploding Balloon

14. Evidence of Chemical Changes Fire/Burning Fire/Burning Bubbling/Gas production Bubbling/Gas production Temperature Change without heating/cooling Temperature Change without heating/cooling Change in Color Change in Color Change in Odor Change in Odor Forms a precipitate Forms a precipitate

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