Understanding Matter: Physical and Chemical Changes Explained

Explore the nature of matter through the concepts of physical and chemical changes. Learn to distinguish between physical changes where the form or shape of a material alters without new substances forming, and chemical changes which result in the creation of new compounds. Discover reactivity in chemical reactions and the concept of sublimation as a solid transitions directly into a gas. Watch educational videos and examples to deepen your understanding of these fundamental scientific principles.

• Matter
• Physical Changes
• Chemical Changes
• Reactivity
• Sublimation

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1. VOCABULARY ADVANCED CLASS Matter Unit 1.3 Week of August 22, 2016 You will need 4 index cards

2. S8P1. Students will examine the scientific view of the nature of matter. e. Distinguish between changes in matter as physical (i.e., physical change) or chemical (development of a gas, formation of precipitate, and change in color).

3. eactivity, combustability, precipitate, oxidation) chemical change, physical change, sublimation,

4. PHYSICAL CHANGES Examples: crumpling a sheet of aluminum foil melting an ice cube casting silver in a mold breaking a bottle A material may change shapes or forms while undergoing a physical change, but no chemical reactions occur and no new compounds are produced. the identity of the matter does not change. Easier or possible to change back.

5. https://www.youtube.com/watch?v=BgM3e8YZxuc

6. Examples: burning wood souring milk mixing acid and base digesting food cooking an egg heating sugar to form caramel baking a cake rusting of iron CHEMICAL CHANGE A Material changes and produces a new substance. A new compound (product) results from a chemical change as the atoms rearrange themselves to form new chemical bonds. Difficult or impossible to reverse.

7. CRASH COURSE CHEMICAL CHANGES HTTPS://WWW.YOUTUBE.COM/WATCH?V=37PIR0EJ_SE

8. REACTIVITY Reactivity in science refers to how various chemicals participate in chemical reactions when they are exposed to other substances. A chemical that reacts easily with other substances is considered highly reactive. Examples: One example of a reactive material is magnesium, which burns brightly when heated. In contrast, platinum does not burn when heated and it is considered non-reactive. Some chemicals react together so strongly that they create a new substance called a compound. A common example of a compound formed through reactivity is water, formed when hydrogen and oxygen react.

9. SUBLIMATION When a solid changes directly to a gas, skipping the liquid phase. https://www.youtube.com/watch?v=PaOFohqjZ1s