Friday, December 5, 2008
Fri-Day 2
AP Chem- we've entered the glorious Bonding and IMFA Unit, the culmination of the Atomic Structure and Periodicity units. Now, we'll actually be able to logically DO/infer something with all of that Zeff and OPEL knowledge (without which, this unit is a bunch of random, arbitrary coincidences...good luck with all that).
:)
Today, we learned the concrete skill of drawing PROPER/CORRECT Lewis Structures for molecules and ions. This fundamental skill will allow us to see and then predict molecular structures/geometry, molecular polarity, and the types of intermolecular attractions for any given molecule. Suffice is to say that knowing how to draw these structures quickly EVERY time is crucial to success in understanding this unit.
I will post some Lewis structure problems with answers and, if I have time, a video podcast (I'm thinking of adding some cool intro music to these podcasts (don't we have a guitar player amongst us?).
Bio 6- we saw and discussed the results of yesterday's photosynthesis and alcoholic fermentation lab. For those who made hw mistakes, download the notes from Blackboard and seriously read or copy them until you find all of the hw answers.
Here are the answers to the objectives that were not graded:
19. Carbon "fixation" is the photosynthesis process in which Carbon in carbon dioxide, via a series of enzyme-controlled reactions, is BONDED/FIXED to other carbon, hydrogen, and oxygen atoms to form molecules of GLUCOSE, C6H12O6.
21. The pH (do not EVER use capital "p" or small "h" for pH!!! That is so wrong.) of water that contains aerobic organisms will DECREASE/become more ACIDIC because aerobic organisms always produce CARBON DIOXIDE from the respiration. SOME of the carbon dioxide dissolves and reacts with water to form CARBONIC ACID, which lowers the pH of the solution! (Notice that the BTB indicator turned YELLOW when YOU (an aerobic organism) breathed your CO2 into the BTB-containing water due to the carbonic acid that formed!
22. Elodea use the CARBON DIOXIDE that you breathed into the water (some CO2 is always dissolved in pond water where Elodea grow). The Elodea, when exposed to LIGHT, will then perform photosynthesis, using up the CARBON DIOXIDE and producing OXYGEN gas when it uses the light (and its enzymes) to SPLIT water into hydrogen and oxygen!
I've also posted the several practice tests with answer keys so you can prepare until you are super-confident about Monday's exam; do not wait until Monday's extra help session-
HOW and WHY questions get first priority at all review sessions because they are most important in understanding biology.
Bio 7/8- we saw and discussed the results of yesterday's photosynthesis lab. We then did the alcoholic fermentation lab and briefly discussed the final results at the end of class (see Blackboard for the notes).
For those who made hw mistakes, download the notes from Blackboard and seriously read or copy them until you find all of the hw answers.
Here are the answers to the objectives that were not graded:
19. Carbon "fixation" is the photosynthesis process in which Carbon in carbon dioxide, via a series of enzyme-controlled reactions, is BONDED/FIXED to other carbon, hydrogen, and oxygen atoms to form molecules of GLUCOSE, C6H12O6.
21. The pH (do not EVER use capital "p" or small "h" for pH!!! That is so wrong.) of water that contains aerobic organisms will DECREASE/become more ACIDIC because aerobic organisms always produce CARBON DIOXIDE from the respiration. SOME of the carbon dioxide dissolves and reacts with water to form CARBONIC ACID, which lowers the pH of the solution! (Notice that the BTB indicator turned YELLOW when YOU (an aerobic organism) breathed your CO2 into the BTB-containing water due to the carbonic acid that formed!
22. Elodea use the CARBON DIOXIDE that you breathed into the water (some CO2 is always dissolved in pond water where Elodea grow). The Elodea, when exposed to LIGHT, will then perform photosynthesis, using up the CARBON DIOXIDE and producing OXYGEN gas when it uses the light (and its enzymes) to SPLIT water into hydrogen and oxygen!
I've also posted the several practice tests with answer keys so you can prepare until you are super-confident about Monday's exam; do not wait until Monday's extra help session-
HOW and WHY questions get first priority at all review sessions because they are most important in understanding biology.
:)
Today, we learned the concrete skill of drawing PROPER/CORRECT Lewis Structures for molecules and ions. This fundamental skill will allow us to see and then predict molecular structures/geometry, molecular polarity, and the types of intermolecular attractions for any given molecule. Suffice is to say that knowing how to draw these structures quickly EVERY time is crucial to success in understanding this unit.
I will post some Lewis structure problems with answers and, if I have time, a video podcast (I'm thinking of adding some cool intro music to these podcasts (don't we have a guitar player amongst us?).
Bio 6- we saw and discussed the results of yesterday's photosynthesis and alcoholic fermentation lab. For those who made hw mistakes, download the notes from Blackboard and seriously read or copy them until you find all of the hw answers.
Here are the answers to the objectives that were not graded:
19. Carbon "fixation" is the photosynthesis process in which Carbon in carbon dioxide, via a series of enzyme-controlled reactions, is BONDED/FIXED to other carbon, hydrogen, and oxygen atoms to form molecules of GLUCOSE, C6H12O6.
21. The pH (do not EVER use capital "p" or small "h" for pH!!! That is so wrong.) of water that contains aerobic organisms will DECREASE/become more ACIDIC because aerobic organisms always produce CARBON DIOXIDE from the respiration. SOME of the carbon dioxide dissolves and reacts with water to form CARBONIC ACID, which lowers the pH of the solution! (Notice that the BTB indicator turned YELLOW when YOU (an aerobic organism) breathed your CO2 into the BTB-containing water due to the carbonic acid that formed!
22. Elodea use the CARBON DIOXIDE that you breathed into the water (some CO2 is always dissolved in pond water where Elodea grow). The Elodea, when exposed to LIGHT, will then perform photosynthesis, using up the CARBON DIOXIDE and producing OXYGEN gas when it uses the light (and its enzymes) to SPLIT water into hydrogen and oxygen!
I've also posted the several practice tests with answer keys so you can prepare until you are super-confident about Monday's exam; do not wait until Monday's extra help session-
HOW and WHY questions get first priority at all review sessions because they are most important in understanding biology.
Bio 7/8- we saw and discussed the results of yesterday's photosynthesis lab. We then did the alcoholic fermentation lab and briefly discussed the final results at the end of class (see Blackboard for the notes).
For those who made hw mistakes, download the notes from Blackboard and seriously read or copy them until you find all of the hw answers.
Here are the answers to the objectives that were not graded:
19. Carbon "fixation" is the photosynthesis process in which Carbon in carbon dioxide, via a series of enzyme-controlled reactions, is BONDED/FIXED to other carbon, hydrogen, and oxygen atoms to form molecules of GLUCOSE, C6H12O6.
21. The pH (do not EVER use capital "p" or small "h" for pH!!! That is so wrong.) of water that contains aerobic organisms will DECREASE/become more ACIDIC because aerobic organisms always produce CARBON DIOXIDE from the respiration. SOME of the carbon dioxide dissolves and reacts with water to form CARBONIC ACID, which lowers the pH of the solution! (Notice that the BTB indicator turned YELLOW when YOU (an aerobic organism) breathed your CO2 into the BTB-containing water due to the carbonic acid that formed!
22. Elodea use the CARBON DIOXIDE that you breathed into the water (some CO2 is always dissolved in pond water where Elodea grow). The Elodea, when exposed to LIGHT, will then perform photosynthesis, using up the CARBON DIOXIDE and producing OXYGEN gas when it uses the light (and its enzymes) to SPLIT water into hydrogen and oxygen!
I've also posted the several practice tests with answer keys so you can prepare until you are super-confident about Monday's exam; do not wait until Monday's extra help session-
HOW and WHY questions get first priority at all review sessions because they are most important in understanding biology.
# posted by C @ 3:30 PM 
