Chemistry WarmUp Copy ALL of these assignments into your binder Including dates, WarmUps, InClass assignments AND page numbers!. August 30-31 WarmUp: Agenda and complete egg in a bottle lab report InClass: Safety Contract review InClass: Lab Bubbles p23
WarmUp: Agenda and complete egg in a bottle lab report
InClass: Safety Contract review InClass: Lab Bubbles p23
Homework: Read and take notes 1.3 p25 q18-25DUE NEXT CLASS
InClass: Introduction to Dimensional Analysis
Homework: Read 1.4 answer q26-27p30 DUE NEXT CLASS
WarmUp: Scientific Method and the Bubbles Lab Revisited
InClass: An Experimental Approach to Science p21TE
InClass: Self-assess bubbles lab
Quiz: Scientific Method ch1.1-1.3
Lab: Using the metric system
Homework: Read 2.1 answer q3-7 DUE NEXT CLASS
As soon as you finish copying these assignments:
Carefully read over and complete your Egg in a Bottle lab report.
Compare your use the rubric to assign yourself a grade.
SLAC: LEADING THE CHARGE: Exotic New Materials for Future Devices
September 28th 7:30-8:30
For extra credit (10 homework or inclass points) turn in
•Your notes signed by the presenter or organizer.
October 9, 2010 UCSC
Proposed theory of spontaneous generation
Also called abiogenesis
Living things can arise from nonliving matter
Idea lasted almost 2000 years
Observation:Every year in the spring, the Nile River flooded areas of Egypt along the river, leaving behind nutrient-rich mud that enabled the people to grow that year’s crop of food. However, along with the muddy soil, large numbers of frogs appeared that weren’t around in drier times
Conclusion: It was perfectly obvious to people back then that muddy soil gave rise to the frogs
Observation:In many parts of Europe, medieval farmers stored grain in barns with thatched roofs (like Shakespeare’s house). As a roof aged, it was not uncommon for it to start leaking. This could lead to spoiled or moldy grain, and of course there were lots of mice around.
Conclusion:It was obvious to them that the mice came from the moldy grain.
Observation:Since there were no refrigerators, the mandatory, daily trip to the butcher shop, especially in summer, meant battling the flies around the carcasses. Typically, carcasses were “hung by their heels,” and customers selected which chunk the butcher would carve off for them.
Conclusion:Obviously, the rotting meat that had been hanging in the sun all day was the source of the flies.
Recipe for mice:
Place a dirty shirt or some rags in an open pot or barrel containing a few grains of wheat or some wheat bran, and in 21 days, mice will appear. There will be adult males and females present, and they will be capable of mating and reproducing more mice.
There were flies around meat carcasses at the Butcher shop.
Where do the flies come from?
Does rotting meat turn into or produce rotting flies?
Rotten meat does not turn into flies. Only flies can make more flies.
What is the the manipulated variable?
What is the the manipulated variable?
Name several controlled variables:
What is the responding (dependent) variable?
1. Unsealed – maggots on meat
2. Sealed – no maggots on meat
3. Gauze – few maggots on gauze, none on meat
1. How does a hypothesis become a theory?
2. Are theories ever wrong?
3. If a scientist subscribes to a hypothesis, but
performs an experiment that disproves the hypothesis
what should he or she do?
4. Explain the role of collaboration and communication in the scientific method.
5. What is
a. manipulated variable?
b. responding variable?
c. controlled variable?
Grading for this warm up:
I didn’t understand, so I put my name and the date on the paper, and wrote down the questions – 1 point
I wrote complete and correct answers to at least half of the questions – 2 more points (total of 3 points)
I wrote complete and correct answers to all of the questions 2 more points (total of 5 points)
When you finish, read and take notes 1.4 and andswer 26 and 27 in that chapter.