1 / 13

Physical & Chemical Changes

Explore the differences between physical and chemical changes in this educational guide. Learn about properties, examples, and reactions of substances undergoing transformations without altering their identity.

blancalawrence
Download Presentation

Physical & Chemical Changes

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Physical & Chemical Changes

  2. Physical Physical Properties Def: changes from one phase to another (solid, liquid, gas), without changing the substance Ex: Chopping, slicing, sawing, grinding, dissolving Melting/ Freezing Vaporizing (Boiling) Condensation Sublimation Evaporation Physical Changes • Def: Properties that can be seen without changing the identity of the substance. • Ex: color, shape, hardness, odor, density, dissolvability, mass, weight, volume, texture

  3. Physical Change • A change in the physical property of a substance • The chemical properties remain the same • Ex: ice to water, carving wood…

  4. Any characteristic that can be observed or measured is a physical property. Length can be measured.

  5. Chemical Chemical Properties Def: Properties that describe how a substance changes into a new substance Ex: flammability (burning) Chemical Changes Def: The process by which a substance changes to a new substance Ex: Combustion (burning) Respiration Digestion Leaves changing color Rusting Photosynthesis Baking/cooking Gasoline burning Alka seltzer in water reacting

  6. Chemical Change • A substance is transformed into a newsubstance • Involves a chemical reaction • Ex. Iron rusting (with oxygen) to form iron oxide, chemical explosions, burning of wood

  7. Signs of a Chemical Change • Signs of a chemical change include the production of bubbles, heat, light, smoke, sounds or color changes.

  8. Example Chemical Reaction • Before During (fire,smoke) • After change

  9. Student Notes Page

  10. Properties Physical Properties Chemical Properties Def: Properties that describe how a substance changes into a new substance Ex: flammability (burning) • Def: Properties that can be seen without changing the identity of the substance. • Ex: color, shape, hardness, odor, density, dissolvability, mass, weight, volume, texture

  11. Changes Physical Changes Chemical Changes Def: The process by which a substance changes to a new substance Ex: Combustion (burning) Respiration Digestion Leaves changing color Rusting Photosynthesis Baking/cooking Gasoline burning Alka seltzer in water reacting • Def: changes from one phase to another (solid, liquid, gas), without changing the substance • Ex: • Melting • Freezing • Vaporizing (Boiling) • Condensation • Sublimation • Evaporation • Chopping, slicing, sawing, grinding, dissolving

  12. Demos

  13. Demo #1 Demo #5 Demo #2 Demo #6 Demo #3 Demo #7 Demo #4 Demo #8

More Related