11/18/2009 Today in class we chose articles from Discover Magazine and followed the directions as shown below. (Due Friday) Science News  Pick a news article from a hard copy news source that interests you. Read and take notes on the article. Be sure to record the following information: Title of article Author of article Page number for the article Name of magazine or news paper Issue date The summary of the article should include: What is the main topic of the article? Who is doing the research? Where is the research taking place? What is the time frame of the research? What are the major findings (conclusions) of the article? What evidence is given to support the conclusion? Why is this information important? Be prepared to share your information with the class. 11/16/2009 and 11/17/2009 Monday and Tuesday we experimented with and discussed Charles' Law. Charles' Law states that for a fixed amount of gas at a constant pressure, as temperature increase, volume increases and as temperature decreases volume decreases. The following link to a video demonstrates and explains Charle's Law. We did an experiment in class with a soda can and steam. See a video of the experiment. If you watch this video please excuse the inappropriate language on one slide ... 11/12/2009 We experimented with gas syringes in class today. We discovered, that as we decreased the volume of a fixed amount of gas at a constant temperature, the pressure increased. And, that if we increased the volume of the gas, the pressure decreased. We experimentally developed the ideas that form Boyle's Law. Try this Boyle's Law application. Boyle's Law Simulation 11/3/2009 Today we graphed the data from the melting point and boiling point labs.  The time represents a constant rate of heat energy added. For our water samples the melting point is at 0oC and the boiling point is 100oC. 11/2/2009 Today in class we began a lab on two changes of state of matter; boiling and melting. We used water to observe these changes of state. We took temperature readings every 30 seconds for 15 to 20 minutes. We will share the data tomorrow in class. 10/26/2009 click on the links to watch a video about: States of Matter  Changes of States of Matter  click on link to see a video How Frost Forms  ______________________________________________ INFO FROM LAST YEAR
5/29/2009 Newton's Playground Rubric Model Base size: 1/a little too big or too small; 2/fits Materials: 0-9/some pre-constructed; 10/Good recycling; 11-13/ super green Use of Materials: 3-7/ Fair-good; 8/ Good; 9-10/ Very good Sturdiness: 7-9/wobbly; 5-6/falling down; 10/Stable; 11-12/super strong Function: 5-14 Works with help; 15/Works well; 16-17/ Works w/Precision! Aesthetics & sign: 3-4/Slummin’; 5/Looks Nice; 6-7/Stylin’ Written Cover Page: 0-3/Missing Something; 4/ Well Done; 5-6/WOW! Picture with Vectors: 0-5 Not Quite; 6/Very Nice; 7-8/WOW! Description of Ride: 0-4 Fair; 5/Good; 6-7/Very Good Individual Vocabulary:0-19 Not all definitions and applications correct: 20/Well Done; 21-22/ Excellent Understanding Presentation Group Content and Organization: 2-4/Needs improvement; 5/Organized and Clear; 6/Entertaining or Good Teaching Individual: 5-9/ Too Quiet or Unclear; 10/ Clear and Organized; 11/Entertaining or Good Teaching Daily Grade Participation/Behavior 15 Clean-up 15 5/15/2009 Check out this website on Bridges .... lots of good info and fun. STE.16.05.02 STE.16.05.03 STE.16.05.04 5/12/2009 It's been a long time since I posted ... sorry. I am putting together video clips that will help you review for the Science MCAS. I will associated each clip with one of the Massachusetts Frameworks for Science and Technology/Engineering click on links to see short videos on each topic 1. Weight vs Mass STE.11.01.01 2. Mass Volume and Density STE.11.01.02 3. Significant Figures STE.11.01.03 4. Conservation of Mass STE.11.01.04 5. 92 Elements STE.11.02.05 6. Atoms and Molecules STE.11.02.06 7. Elements and Compounds STE.11.02.07 8. Mixtures and Pure Substances STE.11.02.08 9. Melting Points of Elements STE.11.02.09 10. Physical and Chemical Changes STE.11.02.10 11. Motion STE.11.03.11 12. Distance, Time, Speed STE.11.03.12 13. Potential and Kinetic Energy STE.11.04.13 14. Heat STE.11.05.15 15. Heat & Changes of State (or phase) STE.11.05.15 16. Heat: From Hot to Cold STE.11.05.16 3/31/2009 Please note that no homework will be accepted late during 4th quarter! Welcome back. Over the passed few weeks we have been balancing chemical reaction equations. below are some sites that you can go to to practice. richardbowles.tripod.com/chemistry/balance.htm chemistry.csudh.edu/lechelpcs/rxnbalancingcsn7.html 3/1/2009 I am adding the vocabulary list and the list of multi-element ions to the site for your convenience. Study until you feel confident! Practice Practice Practice :) Vocab: compound ionic compound Lewis dot notation ion electron donor electron receiver cation anion valence electrons valence state electricity Multi-element ions: anions NO3- nitrate CO3= carbonate SO4= sulfate PO4=- phosphate OH- hydroxide cations NH4+ ammonium 2/24/2009  lithium fluorine as an element as an element P+ 3+ P+ 9+ e- 3- e- 9- Total Total Charge 0 Charge 0  LiF lithium fluoride P+ 3+ P+ 9+ e- 2- e- 10- Total Total Charge 1+ Charge 1-   Be3P2 beryllium phosphide   Homework ... Make 64 ionic compounds combining the cations with the anions from the list above. 2/23/2009 Home work tonight is to make flash cards (about 1/2 the size of a 3X5 index card) for the following elements: Li, Be, B, Na, Mg, Al, K, Ca, and N, O, F, P, S, Cl, Br, I. Each symbol should be marked with the correct Lewis dot notation. 2/13/2009 Have a terrific vacation! Happy Valentine's Day!  2/10/2009 We are finishing the PowerPoint presentation on the the elements this week. Thursday Students will take an open note test on the information they gathered from the presentations of their classmates. anyone who is missing part of the notes is encouraged to borrow someone else's notes and copy them into their own notebook so they have the information needed for Thursday's test. 2/4/2009 Students have started to present their PowerPoint slide shows. We are off to a slow start, but I hope to be finished with presentations next Wednesday, and have the open note test on the element presentations on Thursday February 12. 1/27/2009 Students are making PowerPoint Presentations on their elements. All PowerPoint formatting should be done at school. The final product is due Monday February 2. 1/23/2009 Students are working on their individual element projects. Element Project Rubric for Content: see attachment below Check out some of these example websites and key words. They may be useful. Copper mining ( includes some other metals as well) http://www.mine-engineer.com/mining/copperm.htm Mineral mining maps http://minerals.usgs.gov/minerals/pubs/mapdata/#map Fractional distillation of air (gasses) http://encarta.msn.com/encyclopedia_1741500785/air.html http://engineering.wikia.com/wiki/Fractional_distillation Salt mining http://recipes.howstuffworks.com/salt4.htm Mining and refining aluminum http://science.howstuffworks.com/aluminum2.htm Mining in the Andes http://geography.howstuffworks.com/south-america/the-andes6.htm Helium production http://acswebcontent.acs.org/landmarks/landmarks/helium/production.html Cesium productions http://minerals.usgs.gov/minerals/pubs/commodity/cesium/cesiumcs05.pdf 1/20/2009 Check out the links and attachments below. Interactive Periodic Table http://www.chemicalelements.com The Element Song by Tom Lehrer http://www.privatehand.com/flash/elements.html 1/16/2009 We are studying the periodic table of elements. Students need to know the symbols and the names of the elements interchangeably for the following elements
| 11/2/2009 Conclusion and analysis for dry ice labs: 1. When we put dry ice on the the table and bat it around with our pencil it glided along the table as if there were no friction. This is because as the dry ice sublimes in every direction off its surface, it is also subliming off the bottom surface which is between the piece of dry ice and the table. the CO2 gas pushes in both directions and thus forms a cushion of CO2 gas between the dry ice and the table. This causes it to hover a tiny bit above the table like a hover craft. 2. When we place a chunk of dry ice into a balloon and tie it off, the balloon begins to expand almost immediately. This is because the dry ice is subliming inside the tied off balloon. The gaseous CO2 takes up much more space than the solid and therefore pushes on the elastic balloon making it expand in volume. We also observed frost forming on the outside of the balloon. This was because the dry ice surface is at - 78o C. The water vapor from the air formed frost through the state change of deposition (going directly from a gas to a solid.) 3. When we da piece of dry ice into a film canister (it seals, but will not stay sealed if under too much pressure,) the top popped off with a loud sound and the container went flying all the way to the ceiling. This happened because the dry ice inside the container sublimed. The gaseous CO2 takes up much more space than the solid so as it expanded in the rigid container it produced a great deal of pressure. When the top of the container could no longer hold the pressure it popped. 4.When we placed metal on the dry ice it made a loud screeching sound. No other material made the dry ice scream. This was due to the fact that the metal has very high thermal conductivity. It made the dry ice sublime at a much faster rate that the other materials. The fast stream of gas passing between two tightly squeezed surfaces produced a screaming sound, much like when you produce a "razberry" with your lips. 5.When we place a piece of dry ice in a beaker of warm water, the dry ice sinks to the bottom because it is more dense than water, unlike ice (frozen water) which floats because it is less dense than water. The next thing we observed was that clear colorless bubbles formed around the dry ice (CO2 gas) They floated to the top (less dense than water) and turned foggy white before they popped and formed lots of white fog above the surface of the water. The foggy white color was produced by water vapor from the air condensing around the cold CO2 gas. Remember that the CO2 gas itself is a colorless odorless gas. 6. When we poured the CO2 gas out of the beaker we could tell that it flowed downward because the fog that formed around it flowed downward. Water vapor, or fog usually flows upward because it is less dense than air, the downward flow showed us the direction of the flow of the cold CO2 gas 7. When we poured CO2 gas out of the beaker over the flame of a candle, the flame was extinguished. The CO2 gas flowed over the wick of the candle pushing any oxygen (needed for burning) out of the way and starving the flame of the necessary oxygen. Some fire extinguishers are filled with CO2 for this purpose. 10/29/2009 Dry Ice is solid carbon dioxide. CO2 Dry Ice sublimes (changes from solid to gas) at - 78o C Safety Safety Safety!  We did several experiments with dry ice in class today ... 1. Observe what happens when we put dry ice on the the table and bat it around with our pencil. 2. Place a chunk of dry ice into a balloon and observe what happens. 3. Place a piece of dry ice into a film canister ( it seals, but will not stay sealed if under too much pressure) Never put dry ice into a bottle that has a screw on top! 10/30/2009 We did several more experiments with dry ice in class today ... 4. Dry Ice Scream ... we placed metal on the dry ice and observed what happened. 5.Place a piece of dry ice in a beaker of warm water and observe. 6. Pour CO2 out of the beaker and observe. 7. Pour CO2 out of the beaker over the flame of a candle and observe. 10/27/2009 Changes of state of Matter Chart (stretch window for correct spacing) From To Exo- or Endo- Example ___________________________thermic____________________ Melting solid liquid exo ice melting Freezing liquid solid endo making ice cubes Vaporization liquid gas exo evaporation (on surface only, below boiling point) puddles drying up boiling (throughout liquid, at boiling point) steam from a kettle Condensation gas liquid endo dew, water forming on the outside of a cold drink Sublimation solid gas exo snow "dissapearing" at temps below freezing. dry ice (solid CO2->gas CO2) Deposition gas solid endo frost forming  BridgesMass   Volume  3/2/2009 Below you will find a few compound formulas combining the multi-element cation ammonium (NH4) with the multi-element cations on our list. NH4OH NH4NO3 (NH4)2CO3 (NH4)2SO4 (NH4)3PO4 The following section may help form the 64 ionic compounds assigned on 2/24.
Stretch this page as wide as possible to get the spacing right
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1+ total charge element ion ••• 17 + 17+ Cl- Na+ Cl− or NaCl  http://www.wisegorilla.com/images/chemstry/0-chem01.gif Feldspar ... mineral containing potassium carbonate or potash  http://upload.wikimedia.org/wikipedia/commons/6/66/PotassiumFeldsparUSGOV.jpg Titanium strip mine  http://www.swc.org.za/own_uploads/TearMining.gif Use of tungsten as the filament in a light bulb.  http://sustainabledesignupdate.com/wp-content/uploads/2007/01/light-bulb-glowing-filament-ahd.jpg  http://dollardaze.org/blog/pages/00066/SilvUses2005.gif |
