Monday, December 10, 2007
Mon-Day 1
Bio- we had our Photosynthesis/Cellular Respiration test today.
We then organized our lab folders and watched a segment from "60 Minutes" on a potential treatment for drug addiction. The clip showed compelling "anecdotal evidence" (basically just word-of-mouth stories that may or may not be true and that do not involve a control group or scientific investigation) that the medication, "Pro-Meta", significantly reduces an addictive cravings. What we did NOT get to see was the SCIENTIFIC proof involving "double-blind", controlled studies. Check out the rest of the video and see whether the claims for Pro-Meta have a substantial scientific basis.
http://www.cbsnews.com/stories/2007/12/07/60minutes/main3590535.shtml
If they do not, how do you account for all of the success stories?
Chem 7- we looked at the typical characteristics of metals: luster, malleability, ductility, good electrical and thermal conductivity, easily lose their valence electrons to form smaller positive cations, solids (except for Hg).
We discussed their physical and chemical opposites, the non-metals: dull, brittle, poor thermal and electrical conductivity, easily gain electrons to become larger negative anions.
We noted that the SEVEN SEMIMETALS (metalloids) have properties that are between those of metals and non-metals and that they are important "semi-conductors" that are used in electronic equipment.
We will look at and EXPLAIN the Periodic Law, tomorrow.
Chem 8/9- we looked at the typical characteristics of metals: luster, malleability, ductility, good electrical and thermal conductivity, easily lose their valence electrons to form smaller positive cations, solids (except for Hg).
We discussed their physical and chemical opposites, the non-metals: dull, brittle, poor thermal and electrical conductivity, easily gain electrons to become larger negative anions.
We noted that the SEVEN SEMIMETALS have properties that are between those of metals and non-metals and that they are important "semi-conductors" that are used in electronic equipment.
We used the Reference Tables to see the typical trends in ionization energy, electronegativity, or atomic radius/size across a period or down a group. It's good just to keep it simple and use Li through F for the "across a period" trend and to use Li to K for the "down a group" trend.
We then finished our Periodic Table coloring activity and did some of the questions on another worksheet.
We will look at and EXPLAIN the Periodic Law, tomorrow.
We then organized our lab folders and watched a segment from "60 Minutes" on a potential treatment for drug addiction. The clip showed compelling "anecdotal evidence" (basically just word-of-mouth stories that may or may not be true and that do not involve a control group or scientific investigation) that the medication, "Pro-Meta", significantly reduces an addictive cravings. What we did NOT get to see was the SCIENTIFIC proof involving "double-blind", controlled studies. Check out the rest of the video and see whether the claims for Pro-Meta have a substantial scientific basis.
http://www.cbsnews.com/stories/2007/12/07/60minutes/main3590535.shtml
If they do not, how do you account for all of the success stories?
Chem 7- we looked at the typical characteristics of metals: luster, malleability, ductility, good electrical and thermal conductivity, easily lose their valence electrons to form smaller positive cations, solids (except for Hg).
We discussed their physical and chemical opposites, the non-metals: dull, brittle, poor thermal and electrical conductivity, easily gain electrons to become larger negative anions.
We noted that the SEVEN SEMIMETALS (metalloids) have properties that are between those of metals and non-metals and that they are important "semi-conductors" that are used in electronic equipment.
We will look at and EXPLAIN the Periodic Law, tomorrow.
Chem 8/9- we looked at the typical characteristics of metals: luster, malleability, ductility, good electrical and thermal conductivity, easily lose their valence electrons to form smaller positive cations, solids (except for Hg).
We discussed their physical and chemical opposites, the non-metals: dull, brittle, poor thermal and electrical conductivity, easily gain electrons to become larger negative anions.
We noted that the SEVEN SEMIMETALS have properties that are between those of metals and non-metals and that they are important "semi-conductors" that are used in electronic equipment.
We used the Reference Tables to see the typical trends in ionization energy, electronegativity, or atomic radius/size across a period or down a group. It's good just to keep it simple and use Li through F for the "across a period" trend and to use Li to K for the "down a group" trend.
We then finished our Periodic Table coloring activity and did some of the questions on another worksheet.
We will look at and EXPLAIN the Periodic Law, tomorrow.
# posted by C @ 1:21 PM 
