Reviewed concepts of BB board day last Friday.
Discussion of progress of man and why it took so long to make fire.
Purpose of today's class is to see if we can determine structure of materials from a study of their physical properties.
Did paper lab.
Many students did not finish.
Monday, March 14, 2011
Friday, March 11, 2011
Materials unit: BB Board Day
Bending wire introduces a defect that makes the metal stronger.
Conan video of making sword. Talked about the physics of sword making.
How crystals form out of molten rock...the don't all form at the same temperature.
Cooling slowly allows for the formation of larger crystals.
Demo of defects and cooling using BB boards.
Used microscopes to watch crystal formation and what happens when grains run into each other.
Assigned optional Quia quiz on BB board day.
Bending wire introduces a defect that makes the metal stronger.
Conan video of making sword. Talked about the physics of sword making.
How crystals form out of molten rock...the don't all form at the same temperature.
Cooling slowly allows for the formation of larger crystals.
Demo of defects and cooling using BB boards.
Used microscopes to watch crystal formation and what happens when grains run into each other.
Assigned optional Quia quiz on BB board day.
Thursday, March 10, 2011
Students viewed crystals under the microscope and sketched characteristic crystal shapes.
Students did acid test on crystals.
Students did flame test on crystals to see diagnostic flame colors.
Stamped notebooks.
Students did acid test on crystals.
Students did flame test on crystals to see diagnostic flame colors.
Stamped notebooks.
Wednesday, March 9, 2011
Handed back and went over test.
Had several substances - asked students to classify them. At first most students classified them as solid, liquid, both.
Students then classified them as man-made or natural
I suggested pure vs mixtures.
Students then classified pure as elements or compounds.
Students classified mixtures as smooth (homogeneous) or lumpy (heterogeneous)
In the sludge lab, students will have to separate substances based on physical properties and then identify them.
Had several substances - asked students to classify them. At first most students classified them as solid, liquid, both.
Students then classified them as man-made or natural
I suggested pure vs mixtures.
Students then classified pure as elements or compounds.
Students classified mixtures as smooth (homogeneous) or lumpy (heterogeneous)
In the sludge lab, students will have to separate substances based on physical properties and then identify them.
Friday, March 4, 2011
Handed out study packet for test and went over a lot of it before students got bored.
Asked students to finish packet, especially the vocab section.
Asked students to finish packet, especially the vocab section.
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