Ms. S. Casey

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Posted: April 27, 2011

Started new unit Motion   Homework page 349 Q 3-6   Blast off Lab Reports were due today, they must include the following:   Purpose Question (Out of book) Hypothesis/Prediction of what may happen Materials Procedures- in your own words (pg.276) Evidence (chart) Analysis -> what did you notice questions d,e &g Conclusion
Answers  to questions 1-5 page 271 1.Manganese dioxide speeds up the decomposition of hydrogen peroxide.    Chlorine atoms speeds up decomposition of ozone gas in the atmosphere.    Amylase is an enzyme that speeds up the breakdown of starch in the foods we eat during the process of digestion.   Peroxidase is an enzyme in the liver that speeds up the decomposition of hydrogen peroxide.   2. a) Enzymes are biological catalysts - they speed up the synthesis and breakdown of chemicals in biological systems.  Enzymes are only one type of catalysts. b) Amylase is an enzyme that speeds up the breakdown of starch in food during digestion; peroxidase is an enzyme in the liver that speeds up the decomposition of hydrogen peroxide.   3. Many enzymes are heat sensitive: they break down at higher temperatures.  Therefore, as the temperature is increasing, there are fewer enzymes available to control the chemical reactions in the body.  For example, cooking pineapple "dentatures' the enzymes that digest protein, make it nonfuntional. 4. a) Chlorine catalyze in CFCs catalyze the decompositon of ozone in the stratoshpere.   b) It takes many years for these chemicals to travel from their point of release on the ground up into the stratosphere.  CFCs are still used in some countries.  Also, they persist for years in the atmosphere, and since they are a catalyst, they aren't consumed in the reaction.  Therefore, they can keep catalyzing reactions for years.   5. a) The enzymes in the laundry detergent break down stains in the clothing that are biological in origin           ex: Food stains b) Soaking the garment in cold water gives the enzymes in the detergent time to work and decompose the stain.  Hot water would likely inhibit the action of the enzymes by breaking them down before they could effectively a

Posted: April 18, 2011

TEST Wed on Human Populations and Biodiversity    
Microsoft Office document icon human_popln__biodiversity_notes.doc29.5 KB

Posted: April 11, 2011

Predicting Products - today we looked at examples again and time was give to finish up the final page.  It was be marked tomorrow.  FInd the assignment attached if you have misplaced it.

Posted: April 8, 2011

Classify and Balance was corrected and collected today   Predicting products for reactions was explained and a worksheet assigned.  The five sections on sythesis, decomposition, singe and double replacement and combustion all need to be completed for Monday.

Posted: April 7, 2011

Reviewed the different types of reactions. Corrected homework from last night   HOMEWORK Complete both sides of the assigned worksheet

Posted: April 6, 2011

Notes today on the five types of reactions, all information can also be found in the textbook on the following pages: p 230-232 p 233-235 p 240-241   HOMEWORK P 235  Q 2,3 & 4 P 241 Q 1,2 & 3  

Posted: April 6, 2011

Questions for the Video `The Story of Stuff`   Story of Stuff 1.What did you learn from the video, list three specific things? 2. What is one of the main problems with all the stuff produced in factories? 3. What is produced by women that contains high amounts of toxins? 4. Now that the US doesn`t have the resources it requires for making stuff, where do they get the natural resources needed? Name 2 parts of the environment that have been impacted because of this. 5. When you go to buy an item, ex radio, at a store why doesn`t the price really reflect the cost of the item? 6. Six months after stuff is bought, what % is still being used? 7. Are items made today meant to last for a long time or short time, why? 8. Name three things you think you need to buy because of TV commericals making you feel like you need it. Do you really need it, why or why not? 9. Incineration is used to reduce the amount of trash going in a landfill, why did she say incineration was bad? 10. What can you learn from this video that will help you do your part to improve the environment.

Posted: April 5, 2011

Complete the balancing worksheet assigned in class, remember to write the word equations for the last four questions as well as balance.

Posted: April 4, 2011

Ecologs will be checked at the end of the week   Assignments 1.  Feeling better assignment - pick 15 items from the list and discuss the 5 point for each   2.   Map assigment - textbook  assignment   3.  Complete the ten questions on `The Story of Stuff`` Video


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Added: Sun, Jan 21 2018