Saturday, September 6, 2008
Fri-Day 2
AP Chem- we discussed a few more lab techniques: when lighting a Bunsen burner with a striker, of course you must put the gas on first and immediately thereafter employ the striker above the burner fuel column; however, when using matches or a cigarette lighter, you must FIRST light the flame so that the invisible and combustible methane/oxygen mixture is not already concentrated above the burner fuel column. When dispensing solids from reagent jars, never stick a spatula into the (pure) reagent jar because contamination is possible.
We then did another unit conversion problem as applied to an electrolytic cell.
We began to elucidate the classification of all forms of matter and we will continue to do so after the lab quiz on Monday.
Monday's brief quiz will be 10 questions in 10 minutes; it will cover the lab-related information given in notes/lecture from this past week. So expect questions on Bunsen burner operation, acid-base spills, the substances and chemical equations involved therein. The quiz will NOT be on the summer assignment topics (sig figs, factor-label, etc.), which will be tested on Wednesday.
Bio 6- we discussed the Scientific Method, a logical and practically fool-proof way to determine cause and effect relationships (or lack thereof) in nature/physical reality. We learned how to formally state a hypothesis/prediction statement in "if-then" form. We discussed proper "experimental design" involving a control/comparison group and one or more experimental groups, making sure that ALL but one variables/factors in the experiment are kept the same among the groups. The ONE variable that is different among the groups is called the INDEPENDENT variable and this factor is the "if" or "cause" part of the hypothesis!
We talked about gathering and organizing data: the need for a large sample size, repeated trials, a sufficient length of time for the experiment.
Bio 7/8 - we discussed the Scientific Method, a logical and practically fool-proof way to determine cause and effect relationships (or lack thereof) in nature/physical reality. We learned how to formally state a hypothesis/prediction statement in "if-then" form. We discussed proper "experimental design" involving a control/comparison group and one or more experimental groups, making sure that ALL but one variables/factors in the experiment are kept the same among the groups. The ONE variable that is different among the groups is called the INDEPENDENT variable and this factor is the "if" or "cause" part of the hypothesis!
We talked about gathering and organizing data: the need for a large sample size, repeated trials, a sufficient length of time for the experiment.
We then applied our discussion to the lab activity, "Testing a New Drug". We will continue this activity on Monday.
We then did another unit conversion problem as applied to an electrolytic cell.
We began to elucidate the classification of all forms of matter and we will continue to do so after the lab quiz on Monday.
Monday's brief quiz will be 10 questions in 10 minutes; it will cover the lab-related information given in notes/lecture from this past week. So expect questions on Bunsen burner operation, acid-base spills, the substances and chemical equations involved therein. The quiz will NOT be on the summer assignment topics (sig figs, factor-label, etc.), which will be tested on Wednesday.
Bio 6- we discussed the Scientific Method, a logical and practically fool-proof way to determine cause and effect relationships (or lack thereof) in nature/physical reality. We learned how to formally state a hypothesis/prediction statement in "if-then" form. We discussed proper "experimental design" involving a control/comparison group and one or more experimental groups, making sure that ALL but one variables/factors in the experiment are kept the same among the groups. The ONE variable that is different among the groups is called the INDEPENDENT variable and this factor is the "if" or "cause" part of the hypothesis!
We talked about gathering and organizing data: the need for a large sample size, repeated trials, a sufficient length of time for the experiment.
Bio 7/8 - we discussed the Scientific Method, a logical and practically fool-proof way to determine cause and effect relationships (or lack thereof) in nature/physical reality. We learned how to formally state a hypothesis/prediction statement in "if-then" form. We discussed proper "experimental design" involving a control/comparison group and one or more experimental groups, making sure that ALL but one variables/factors in the experiment are kept the same among the groups. The ONE variable that is different among the groups is called the INDEPENDENT variable and this factor is the "if" or "cause" part of the hypothesis!
We talked about gathering and organizing data: the need for a large sample size, repeated trials, a sufficient length of time for the experiment.
We then applied our discussion to the lab activity, "Testing a New Drug". We will continue this activity on Monday.
# posted by C @ 1:58 PM 
