DEMO-P.O.D. DAY 1 - Water-filled Aquarium Buy one can of Coke and Diet Coke. (SMS Cafeteria, $0.75 ea.; 7-11, $0.99 ea.) SUMMARY QUESTIONS GSLG pp. 23-24 (pp. 119-120 TRG) - need a glass marble & bowling ball (GSLG p. 24, #2) - Borrow a bowling ball. (Ask students; Sandburg All) DEMO-P.O.D. DAY 2 - SALT WATER-filled Aquarium (D = 1.03 g/cc) - BOTH cans should float! [Problem: It takes a LOT of salt to increase the density of water sufficiently to buoy a 12 oz. can of Coke Classic! At first, saltwater looks milky; eventually the water clears enough to look like fresh water.] Solution: Use Grade 7 ecology lab plastic "aquarium"; fill with water to ~1-2" of top. Place can in water sideways.] "Density Dilemnas" GSLG p. 27, No. 3: "RAINBOW" COLUMN OF LIQUIDS - Set up density of liquids graduated cylinder; from bottom-to-top: 30 mL corn syrup ~1.37g/cc (dark, natural amber); 40 mL water 1.0 g/cc (plus two drops yellow food coloring); 30 mL alcohol ~0.79g/cc (plus two drops green food coloring) Google Search: density of corn syrup http://www.csun.edu/~vceed002/BFI/lessons/inversion/inversion_layer.html DENSITY DILEMNAS GSLG pp. 27-28 (pp. 123-124 TRG) - Safeway: buy dry ice; grill lighter - Dry ice; borrow Party Bubbles. ["Density Dilemnas," GSLG pp. 27-28 (TRG pp. 123-124), #4, #8] - Either WAT or Science Olympiad: Helium balloon(s) ("Density Dilemnas," GSLG pp. 27-28, #8, ?#11?) - Find apparatus for "Bubbles Flambe'," grill lighter ("Density Dilemnas," GSLG pp. 27-28, #8, ?#11?) <-- Note: Rig a lighter extension (mount on end of meter stick) WILL IT FLOAT? - SMS Cafeteria: Metal pan of ice (H2O) + beaker of alcohol - Borrow P.E. items for "Will It Float?" (Debbie Sorber) ==TEXT FROM MEMOS TO SELF== Subject: Metric System Volume Equivalents 1 kL = ? cc Google Search: 1 kiloliter = ? cubic centimeters 1 kiloliter = 1 000 000 cubic centimeters Google Search: cube root calculator http://www.analyzemath.com/Calculators_3/cube_root_calculator.html x = 1.0e6 cube root(x) = 100.0 (cm) Note: 100.0 cm = 1.0 m Reality Check: 100cm x 10(3) = 1 000 000cc or 1 kL -- Google Search: 1e6 cubic centimeters = ? cubic meters 1e6 (cubic centimeters) = 1 cubic meters -- therefore, 1kL = 1m(3) 1 kiloliter = 1 cubic meter or 1,000,000 cubic centimeters (cc) Note: 1L = 1,000 ml or 1,000 cc, 10cm(3) == Subject: How Tightly Packed? Summary Questions GSLG p. 24, #2 "Misconception Alert" Density of glass marble versus plastic bowling ball Both glass and plastic have a range of densities, depending upon the content. E.g., leaded glass (crystal) is more dense than lead-free glass. Glass: 2.4 - 7.2 g/cc Plastic: 0.955 - 1.506 (rubber) == Bubble Formulae http://www.exploratorium.edu/ronh/bubbles/formulae.html == Subject: Density "Rainbow" Column Use relatively clear 100 ml graduated cylinder. (Clear plastic works O.K.) Recipe (from bottom-to-top): 30 mL - Corn Syrup (dark, naturally amber-colored) D = ~1.37g/cc [Note: Place glass funnel over center of mouth of graduated cylinder (in order to prevent corn syrup from getting on sides of cylinder). Fill funnel; allow corn syrup to drip slowly into graduated cylinder. When volume reaches 30 mL, quickly (but carefully!) remove funnel and place it in bottle of corn syrup 'til funnel drains completely.] 40 mL - Water (plus two drops yellow food coloring) D = 1.0 g/cc [Note: Use 10 ml extra water in case there's some mixing (diffusion) between the alcohol and water when the alcohol is poured on top of the water.] 30 mL - Isopropyl Alcohol (plus two drops green food coloring) D = ~0.79 g/cc == >> "Diving Tony" Cartesian Diver (buoyancy): Place an eye dropper (dry) inside a two-liter plastic bottle filled to capacity with water. Show Tony some love and squeeze him! Google Search: which liquids are compressible? "All fluids are compressible (that is, their density increases under increasing pressure) to some extent, but liquids are much less compressible than gases ..." == [fill in the gap...] == 17 NOV 2006 Subject: Chemical Detective ***NOTE: Be sure to use at least a walnut-sized piece of steel wool.*** The exothermic reaction is much less evident when using smaller pieces of steel wool. Flask/balloon: Alka Seltzer + H20 --> CO2(gas) Alternate procedure: Baking soda + vinegar = CO2 http://www.myschoolonline.com/folder/0,1872,2507-108666-2-18926,00.html -- Follow-up demo: [Zinc sulfate + Hydrogen gas] Zn + H2SO4 --> ZnSO4 + H2(up arrow, or gas) [Zinc + Sulfuric acid] *As a catalyst, add two drops of CuSO4 solution. [Squeaky the Chihauhau] Pop! = 2H2 + O2 --> 2H2O + energy [balanced equation] [hydrogen gas + oxygen gas --> water + energy] <-- Note: Some mass may be converted to energy. Is this an example of Einstein's famous equation, E = mc2? Mass and energy are equivalent, not two separate domains! Alternate Procedure: Zn + HCl --> ZnCl2 <--[where's the hydrogen gas?] [Zinc + Hydrochloric acid --> Zinc chloride] [reactants --> products] -- Colorful Chemical Clues Litmus paper is impregnated with an extract from lichens. Lichens "straddle" two kingdoms: the plant kingdom; and the fungi kingdom. [What did the boy mushroom say to the girl mushroom? I'm a fungi (fun guy)!] Provisioning: Need ~150ml cabbage juice per class for both Parts 1 & 2. Fill each well 3/4 full with each of the seven (7) common household solutions; add ten (10) drops of cabbage juice in each well. The products of a neutralization reaction (reactants = acid + base) are water and a salt. [Did you hear about the peanut walking down the street? It was assaulted (a salted).] ==== [Note: Misc. planning notes (below). Integrate at appropriate locations (above).] >> METRIC SYSTEM > Construct cubic meter, using, well, meter sticks! 12 to be exact. -- >> DENSITY DEMO-P.O.D. (x) DAY 1 - Water-filled Aquarium (x) Buy one can of Coke and Diet Coke. (SMS Cafeteria, $0.75 ea.) SUMMARY QUESTIONS GSLG pp. 23-24 (pp. 119-120 TRG) - need a glass marble & bowling ball - Borrow a bowling ball. (Ask students; Sandburg All) (GSLG p. 24, #2) DEMO-P.O.D. DAY 2 - SALT WATER-filled Aquarium (D = 1.03 g/cc) - BOTH cans should float! [Problem: It takes a LOT of salt to increase the density of water sufficiently to buoy a 12 oz. can of Coke Classic! At first, saltwater looks milky; eventually the water clears enough to look like fresh water.] Solution: Use Grade 7 ecology lab plastic "aquarium"; fill with water to ~1-2" of top. Place can in water sideways.] "Density Dilemnas" GSLG p. 27, No. 3: RAINBOW LIQUIDS - Set up density of liquids graduated cylinder; from bottom-to-top: 30 mL corn syrup ~1.37g/cc (dark, natural amber); 40 mL water 1.0 g/cc (plus two drops yellow food coloring); 30 mL alcohol ~0.79g/cc (plus two drops green food coloring) Google Search: density of corn syrup http://www.csun.edu/~vceed002/BFI/lessons/inversion/inversion_layer.html DENSITY DILEMNAS GSLG pp. 27-28 (pp. 123-124 TRG) (x) - Safeway: buy dry ice; grill lighter (x) - Dry ice; borrow Party Bubbles. ["Density Dilemnas," GSLG pp. 27-28 (TRG pp. 123-124), #4, #8] (x) - Either WAT or SciOly: Helium balloon(s) ("Density Dilemnas," GSLG pp. 27-28, #8, ?#11?) (x) - Find apparatus for "Bubbles Flambe'," grill lighter ("Density Dilemnas," GSLG pp. 27-28, #8, ?#11?) ***Mount a wood splint on the end of a meter stick.*** WILL IT FLOAT? (x) - SMS Cafeteria: Metal pan of ice (H2O) + beaker of alcohol (x) - Borrow P.E. items for "Will It Float?" (Debbie Sorber) (x) - Borrow a hockey puck. (Liz S.) (x) > Use Science Olympiad bathroom scale (weight) to measure weight of green bowling ball (on loan from Amanda Bostic, Per. 1 student). ~8 lb (x) Borrow ?lead? shotput from PE. Measure it's diameter; calculate its volume and density. [Note: Shot I borrowed weighs ~8-9 lb; most likely a women's shot, possibly composed of lead and steel.] http://en.wikipedia.org/wiki/Shot_put In men's competition, the shot weighs 7.26 kilograms (16 pounds). The women's shot weighs 4 kg (8.8 pounds). American high schools usually use 12 pound (5.44 kg) shots for boys and 4 kg shots for girls; these are sometimes known as practice shots. The weight of the ball differs depending [upon] the age group. > Lab Practicum: (x) > Lab Practicum: Use lead and steel samples. Check ePAT ref. sheet to see if it includes the formula for the volume of a cylinder (geom. shape of unknown samples). <-- It does! Make photocopies. > Count for Honors G/T only; count for benchmark quiz(zes), Per. 1 & 3 [check for correct meas. of mass & volume, correct calculation of density (showing 3-step problem-solving process)], otherwise drop the score. (x) >> Grade lab practicum, Per. 2 Quality of work too poor; grade as 10-pt. extra credit activity (x) SMS Library - check out Bill Nye videos, "Buoyancy" & "The Atom" -- >> IVISIBLE ATOM Real-world use of atom-related vocab. words: >> Saturn Ion (car) Google Search: ion + car http://www.saturn.com/saturn/vehicles/ionsedan/overview.jsp >> Isotopes: Google Search: isotopes + baseball team * Springfield Isotopes (The Simpsons) - life imitates art http://impressive.net/archives/fogo/20020906201458.GA7943@impressive.net * Albuquerque Isotopes - Minor league baseball affiliate of the Florida Marlins. http://www.albuquerquebaseball.com/ -- >> NUTS & BOLTS (x) - Borrow more digital balances [five (5) total]. - 6" clear plastic rulers + calipers (x) - Print & make overhead transparencies: Nuts-and-Bolts_Solutions.ppt; TAK_Nuts-and-Bolts_pp156-158_Grade-8-TRG_2006-2007.pdf; new data table & TAK data table; new .xmbl files (x) > Print compare/contrast TRG TAK N&B data table w. my measurements: - TAK_pp108-112_TRG.pdf - TAK_Nuts-and-Bolts_Data-Table_p48_ver2.doc > (x) Print (highest quality)/make overhead transparency: TAK_Nuts-and-Bolts_Data-Table_p48_ver2.doc -- >> DISCOVERING THE ELEMENTS (x) > Modify TAP grading rubric (x) > art paper cutter - cut paper for "Element Foldables" Explore GSLG activity re: Periodic Table groups TRG, PDF pp. 114-135 = Discovering the Elements - Exploring the Periodic Table * - PDF pp. 124-125 = Multiple Choice Assessment: Using the Periodic Table * - PDF pg. 127 = Activity 1: Using the Periodic Table ** - PDF pg. 128 = Activity 2: Research an Element - PDF pg. 129 = Activity 3: Discovering Relationships Within Your Group [skip] * - PDF pg. 130 = Activity 4: Comparing the Groups * - PDF pg. 131-135 = Activity 5: Element Meets Element [common compounds] -- >> CHEMICAL DETECTIVE TRG, PDF pg. 136-... = Chemical Detective -- >> DISAPPEARING POWDER [temp done; need to revise (streamline) Kyle's verbose directions] (x) > Find Solubility and Temperature *.doc directions/data table; upload to webserver -- >> THE NAME IS BOND (x) > Which Vernier probe/sensor did we use to measure conductivity? The "conductivity probe," of course!