1 / 32

Bellringer 11-7-2013

Bellringer 11-7-2013. What are the 2 most basic categories of matter? If you shine a flashlight through a glass of KoolAid and then a glass of water with a little milk mixed in, which one(s) would you see the light beam going through the glass? a. Kool-Aid b. Milky water c. Both.

sorcha
Download Presentation

Bellringer 11-7-2013

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. Bellringer 11-7-2013 • What are the 2 most basic categories of matter? • If you shine a flashlight through a glass of KoolAid and then a glass of water with a little milk mixed in, which one(s) would you see the light beam going through the glass? a. Kool-Aid b. Milky water c. Both

  2. What is Matter? • It has mass and takes up space • Everything around us is matter

  3. ON A PIECE OF NOTEBOOK PAPER, MAKE THE FOLLOWING GRAPHIC ORGANIZER

  4. Physical Properties • Definition:can be observed without altering the chemical composition of a substance • Examples: color, texture, malleability, solubility, mass, volume, density Malleable: capable of being extended or shaped by beating

  5. Play Dough: Physical Properties • Color? • Texture? • Malleability? • Mass? • Solubility?

  6. Physical Properties Physical properties can be described as being intensive or extensive.

  7. Extensive Properties: • Dependent on size. • volume, mass, and length

  8. Intensive Properties: • do not change with the sample size • can be useful in identifying a substance • color, density, viscosity, temperature, solubility, and states of matter.

  9. Chemical Properties • Definition: the ability of a substance to combine with or change with other substances. • Toxicity, reactivity, flammability, radioactivity

  10. Play Dough: Chemical Properties • Toxicity • Reactivity • Flammability • Radioactivity

  11. #1 • The boiling point of a certain alcohol is 75 degrees Celsius Physical

  12. #2 • Copper forms green copper carbonate when in contact with moist air Chemical

  13. #3 • Table salt dissolves in water Physical

  14. #4 • Copper is a good conductor of heat and electricity Physical

  15. #5 • Magnesium burns brightly when ignited Chemical

  16. #6 • Iron is more dense than aluminum Physical

  17. What’s the Difference? • Matter can change • Examples: Freeze, cut, burn, etc. • 2 types of changes • Physical changes • Chemical changes

  18. Physical Changes • Definition:when the state or form of matter is changed physically or mechanically • Clue: still the same stuff • Examples: breaking, cutting, freezing, melting, etc. Ask yourself…”Can it be turned back into how it started?” Yes

  19. Chemical Change • Definition: takes place on a molecular level (reaction) and produces a new chemical substance. • Clue: new stuff, color etc. • A chemical change always involves a chemical reaction

  20. Where is the Evidence??? • Evidence of chemical change: • color change, gas production, and release of heat, light, odor, or sound. • Examples: Burning (combustion), rusting, tarnishing and fermenting

  21. ice melting P

  22. burning a chemistry book C

  23. melting iron P

  24. frying an egg C

  25. fireworks exploding in the sky C

  26. turning wood into a baseball bat P

  27. baking a cake C

  28. sharpening a pencil P

  29. sulfuric acid added to sugar C http://www.youtube.com/watch?v=nqDHwd9rG0s

  30. carving a watermelon into a creepy looking face P

  31. pouring liquid nitrogen into a bowl and watching it vaporize P

  32. Exit Ticket: • A chemist is looking to describe a chemical with a intensive property. Which of the following is an intensive property? • Mass is 6.7g • Boiling point is 500 C • Volume is 4 cm3 Label as physical or chemical: Ice melting Baking a cake Iron rusting

More Related