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Tuesday, September 22, 2009

Tuesday, September 22, 2009. Warmup: Create a “KWL”- WATER PURIFICATION: What do you know? What do you want to know? Leave the “L” blank for now. Pg. 165 #6-9 discussed, due. Notes: p.165#10-13 Safety Goggles Begin lab p.756-9 Homework: Read Chapter 4 this week, P.115#1-3 due tomorrow.

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Tuesday, September 22, 2009

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  1. Tuesday, September 22, 2009 • Warmup: Create a “KWL”- WATER PURIFICATION: What do you know? What do you want to know? Leave the “L” blank for now. • Pg. 165 #6-9 discussed, due. • Notes: p.165#10-13 • Safety Goggles • Begin lab p.756-9 • Homework: Read Chapter 4 this week, P.115#1-3 due tomorrow.

  2. Page 165 #10-13 NOTES • 10. How could each of the following atoms react to achieve a noble- gas configuration? • A. iodine. • Info : I, #53, group 17. • Answer: Iodine would need to gain an electron, becoming an anion. I-

  3. Page 165 #10-13 NOTES • 10. How could each of the following atoms react to achieve a noble- gas configuration? • B. strontium • Info: Sr, #38, Group 2 • Answer: strontium would lose two electrons, becoming a cation, Sr +2

  4. Page 165 #10-13 NOTES • 10. How could each of the following atoms react to achieve a noble- gas configuration? • C. Nitrogen • Info: N, # 7, group 15, 5 valence electrons • Answer: Nitrogen would acquire 3 electrons, becoming an anion, N-3

  5. Pg. 165 #11 • Electron configurations… • Orbitals, energy levels, s,p,d,f,g • Beryllium, oxygen • Electron spins

  6. Tuesday, September 22, 2009 • Warmup: Create a “KWL”- WATER PURIFICATION: What do you know? What do you want to know? Leave the “L” blank for now. • Criminalistics p.167-8 #1-33 due • Magnetic Field Lines Lab is due • Homework due Thursday: p.626 Physical Science Book, #35 • Notes p. 541-553(PHYSICS book) due in binder Thurs.

  7. PLEASE QUIETLY LISTEN TO THE ANNOUNCEMENTS…

  8. Notes p.541-53, PHYSICS • Chapter 20 : Static Electricity • Electrostatics: the study of electric charges that can be collected and held in one place. • Key Words: electrostatics, neutral, insulator, conductor • Like charges repel; opposite charges attract

  9. Notes p.541-53, PHYSICS • Static electricity can be produced by conduction, induction, and friction. • FRICTION: two objects rub against each other- there is a transfer of electrons • CONDUCTION: a charged object touches a conductor; there is a transfer of electrons

  10. examples • FRICTION: rub balloons with fur; rub hair with balloon; shuffle feet across the carpet • CONDUCTION: A person with a static charge touches a friend and they get a SHOCK; a charged balloon touches foil on an electroscope

  11. induction • INDUCTION- When a charged object comes NEAR another object, causing a displacement of electrons • Excess charge can be transferred out of the opposite end of the object … • A diagram follows.

  12. Page 544- PHYSICS • MICROSCOPIC VIEW OF CHARGE • When the atom has the same number of protons and electrons, it is NEUTRAL • CONDUCTORS easily surrender their electrons. Metals are good conductors. • INSULATORS do not easily surrender their electrons; wood is a good insulator.

  13. SEPARATION OF CHARGE • Another way of visualizing transfer of static electricity • Induction: positive and negative charges are separated within an object, but not transferred beyond the object • Conduction and Friction: charges are first separated, then transferred

  14. Tuesday, September 22, 2009 • Warmup: What are some PROPERTIES of water? • HW due- answers to yesterday’s lab safety q’s • Quick Lab: Observations • Discuss: Properties. Define chemical and physical properties, give examples • Begin density lab • Homework Frayer Models for each of 10 vocab words, due Thurs.

  15. Warmup: Properties of Water • Liquid • Clear • Drink it • Sometimes salty • Part of the environment • In food • No taste/ “nasty” • Natural • Can swim in it-fish, people • Bubbles • Can make things with it • Can wash in it • H2O • Grow plants • Keep hydrate • Has minerals

  16. QUICK LAB: observations • What characteristics/ categories can we observe? • As a class: construct a table • Complete the table • Due today

  17. QuickLab: Observations

  18. Physical Property • Definition: • Examples:

  19. Chemical Property • Definition: • Examples:

  20. Begin Density Lab • What is density? • How is it calculated? • What is the density of water? • How can we find the density of a bowling ball?

  21. Vocabulary Words • Density • Mass • Volume • Physical property • Chemical property • Weight • Mixture • Compound atom • molecule

  22. Frayer Model

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