1. does the paper examine all possible sources of evidence for or against global warming?
2. is the paper reciting relevant information?
3. are the methods for gathering data stated and are they accurate?
4. does the evidence support the main idea and does the paper as a whole follow logical reasoning? or does it simply state a bunch of random facts that do not apply to the idea presented.
5. are there multiple sources of evidence that draw the same conclusion? are there any sources that prove the hypothesis wrong?
Tuesday, September 20, 2011
pennies
Post on your blog your group presentation related to the questions on masses posed in class:
What would a penny weigh picked up from the sidewalk?
What would a 1908 penny weigh?
What would a 1793 penny weigh?
The answer depends on the weight of the penny that you picked up.
1793-1857 13.48g 100%cu
1857-1943 3.11g 95%cu, 5%zn
1943 2.67g zinc coated steel
1944-1982 3.11g 95%cu, 5%zn
1982-2011 2.50g 97.5%zn, 2.5%cu
considering the us mint melts down pennies that have seen over 20 years of use we can assume that you are most likely to pick up a 2.5g penny.
a 1908 penny weighed 3.11g
a 1793 penny would have wieghed 13.5g or 13.48g since there were 2 pennies made that year. one was the flowing hair wreath cent which was the heavier of the two. the other was the flowing hair chain cent.
reflection
My group, like all others, spent a majority of our time looking up the history of the penny and lost sight of the questions being asked. Even though our schedules did not allow us to meet as a group at any point in the two days given, we could have still shown theoretical values for the experiments we thought of. we would have shown probabilities if that is what the question had asked for. the question stated what would a penny weigh if you picked it up. but given the information we could not calculate the EXACT weight of a penny if you were to pick up a random one. so we concluded the question as unsolvable.
to improve our presentation i would have found it interesting to follow the path of calculating an accurate force of gravity in front of the cafe. finding the distance from the center of the earth to sea level in wisconson would be the hard part and adding elevation of the cafe the easier part of the equation.
other groups should follow the same advice we recommended for ourselves. they focused on the history and not the question. the first group had good experimental data and the fun facts group had a nice way of breaking the stream of information with a little humor.
What would a penny weigh picked up from the sidewalk?
What would a 1908 penny weigh?
What would a 1793 penny weigh?
The answer depends on the weight of the penny that you picked up.
1793-1857 13.48g 100%cu
1857-1943 3.11g 95%cu, 5%zn
1943 2.67g zinc coated steel
1944-1982 3.11g 95%cu, 5%zn
1982-2011 2.50g 97.5%zn, 2.5%cu
considering the us mint melts down pennies that have seen over 20 years of use we can assume that you are most likely to pick up a 2.5g penny.
a 1908 penny weighed 3.11g
a 1793 penny would have wieghed 13.5g or 13.48g since there were 2 pennies made that year. one was the flowing hair wreath cent which was the heavier of the two. the other was the flowing hair chain cent.
reflection
My group, like all others, spent a majority of our time looking up the history of the penny and lost sight of the questions being asked. Even though our schedules did not allow us to meet as a group at any point in the two days given, we could have still shown theoretical values for the experiments we thought of. we would have shown probabilities if that is what the question had asked for. the question stated what would a penny weigh if you picked it up. but given the information we could not calculate the EXACT weight of a penny if you were to pick up a random one. so we concluded the question as unsolvable.
to improve our presentation i would have found it interesting to follow the path of calculating an accurate force of gravity in front of the cafe. finding the distance from the center of the earth to sea level in wisconson would be the hard part and adding elevation of the cafe the easier part of the equation.
other groups should follow the same advice we recommended for ourselves. they focused on the history and not the question. the first group had good experimental data and the fun facts group had a nice way of breaking the stream of information with a little humor.
Friday, September 16, 2011
PDP general guidelines
1. Developing a plan with a mentor using individual and school assessments,
teacher standards, goals of the desired job area, school improvement plan.
2. Listing goals and prioritizing according to the standard indicated.
3. Giving headings to major goals with specific plans-of-action and strategies.
4. Identifying the resources needed to achieve the goals and the persons involved.
5. Reviewing the plan and supporting portfolio during specified dates to evaluate
success and redefine goals and plans-of-action.
6. Recording all information, books read, conferences attended and notes.
teacher standards, goals of the desired job area, school improvement plan.
2. Listing goals and prioritizing according to the standard indicated.
3. Giving headings to major goals with specific plans-of-action and strategies.
4. Identifying the resources needed to achieve the goals and the persons involved.
5. Reviewing the plan and supporting portfolio during specified dates to evaluate
success and redefine goals and plans-of-action.
6. Recording all information, books read, conferences attended and notes.
Subscribe to:
Posts (Atom)