Handed back Distillation of Wood Labs
Went over lab sheet and set-up for PDB lab.
Students did lab.
For homework, students will finish the graph, showing all the important features and phases, and hand it in along with answers to observation questions and conclusions.
Tuesday, March 31, 2009
Monday, March 30, 2009
Monday, March 30, 2009 - Block 4A
Handed back Distillation of Wood Labs
Went over lab sheet and set-up for PDB lab.
Students did lab.
For homework, students will finish the graph, showing all the important features and phases, and hand it in along with answers to observation questions and conclusions.
Went over lab sheet and set-up for PDB lab.
Students did lab.
For homework, students will finish the graph, showing all the important features and phases, and hand it in along with answers to observation questions and conclusions.
Friday, March 20, 2009 - Block 4B
Showed several short demos:
Thermal conductivity
Thermal expansion
Pressure with soda can
Convection with Erlenmeyer volcanoes.
Gave students time in class to work on worksheets.
Thermal conductivity
Thermal expansion
Pressure with soda can
Convection with Erlenmeyer volcanoes.
Gave students time in class to work on worksheets.
Thursday, March 19, 2009
Thursday, March 19, 2009 - Block 4A
Three students went to front of class and discussed the heating lab.
I asked for the general statement of the lab. Students made a graph of the heating curve as their hypothesis so the general statement is to determine the heating curve for water.
On the graph, students indicated what phases they had and what process was going on.
I summarized the results and showed that the heating curves can be used to identify different liquids.
Drew the experimental set-up for distillation. Showed that if you have 2 liquids you should use 3 test tubes and if you have 3 liquids you should use 5 test tubes.
Also sketched out the mothball lab. Showed the set-up. Students predicted the heating and cooling curve, phases for each section, and the process.
Handed out RA 2.1b, RA 2.2a
Students did really well today. I should have done a more fun activity instead of these reading assignments.
Students worked on these for the remainder of the class.
I asked for the general statement of the lab. Students made a graph of the heating curve as their hypothesis so the general statement is to determine the heating curve for water.
On the graph, students indicated what phases they had and what process was going on.
I summarized the results and showed that the heating curves can be used to identify different liquids.
Drew the experimental set-up for distillation. Showed that if you have 2 liquids you should use 3 test tubes and if you have 3 liquids you should use 5 test tubes.
Also sketched out the mothball lab. Showed the set-up. Students predicted the heating and cooling curve, phases for each section, and the process.
Handed out RA 2.1b, RA 2.2a
Students did really well today. I should have done a more fun activity instead of these reading assignments.
Students worked on these for the remainder of the class.
Wednesday, March 18, 2009
Wednesday, March 18, 2009 - Block 4B
Two students went to front of class and discussed the heating lab.
I summarized the results and showed that the heating curves can be used to identify different liquids.
Drew the experimental set-up for distillation. Showed that if you have 2 liquids you should use 3 test tubes and if you have 3 liquids you should use 5 test tubes.
Handed out RA 2.1b, RA 2.2a
Students worked on these for the remainder of the class.
I summarized the results and showed that the heating curves can be used to identify different liquids.
Drew the experimental set-up for distillation. Showed that if you have 2 liquids you should use 3 test tubes and if you have 3 liquids you should use 5 test tubes.
Handed out RA 2.1b, RA 2.2a
Students worked on these for the remainder of the class.
Tuesday, March 17, 2009
Tuesday, March 17, 2009 - Block 4A
Handed out pink sheet for dry lab for Distillation of Wood for those who did not hand it in. This is due by Friday of this week. It is a reduced write-up that will be graded at 80% of the available score and should allow students to recover some credit for the lab write-up.
Reviewed Thursday's class:
Phases of matter: solid, liquid, gas
Solids have a definite shape and a definite volume
Liquids have a definite volume but take the shape of their container
Gases take the shape of their container and fill the container.
It takes energy to go from solid--> liquid --> gas
In today's lab we are going to add heat using a hot plate to a mixture of ice water, melt the water, heat the water, and boil the water.
Hypothesis: In your lab notebooks, sketch your prediction for the heating curve for this experiment, Temperature on the y-axis and adding energy or time on the x-axis.
We will assume the hot plate adds heat at a constant rate.
Explained how to set up the lab and how to use the computers.
In this lab you need to wear goggles so long as the hot plates are on and you need to use the stirring rod to constantly stir the water so it has a uniform temperature throughout.
For today's lab, I had all the equipment in boxes so I didn't waste time handing out the computer equipment. It went much more smoothly. Every group finished with time to spare.
Students printed out their heating curves. We will discuss them next time.
Reviewed Thursday's class:
Phases of matter: solid, liquid, gas
Solids have a definite shape and a definite volume
Liquids have a definite volume but take the shape of their container
Gases take the shape of their container and fill the container.
It takes energy to go from solid--> liquid --> gas
In today's lab we are going to add heat using a hot plate to a mixture of ice water, melt the water, heat the water, and boil the water.
Hypothesis: In your lab notebooks, sketch your prediction for the heating curve for this experiment, Temperature on the y-axis and adding energy or time on the x-axis.
We will assume the hot plate adds heat at a constant rate.
Explained how to set up the lab and how to use the computers.
In this lab you need to wear goggles so long as the hot plates are on and you need to use the stirring rod to constantly stir the water so it has a uniform temperature throughout.
For today's lab, I had all the equipment in boxes so I didn't waste time handing out the computer equipment. It went much more smoothly. Every group finished with time to spare.
Students printed out their heating curves. We will discuss them next time.
Monday, March 16, 2009 - Block 4B
Handed out pink sheet for dry lab for Distillation of Wood for those who did not hand it in. This is due by Friday of this week. It is a reduced write-up that will be graded at 80% of the available score and should allow students to recover some credit for the lab write-up.
Reviewed last Wednesday's class:
Phases of matter: solid, liquid, gas
Solids have a definite shape and a definite volume
Liquids have a definite volume but take the shape of their container
Gases take the shape of their container and fill the container.
It takes energy to go from solid--> liquid --> gas
In today's lab we are going to add heat using a hot plate to a mixture of ice water, melt the water, heat the water, and boil the water.
Hypothesis: In your lab notebooks, sketch your prediction for the heating curve for this experiment, Temperature on the y-axis and adding energy or time on the x-axis.
We will assume the hot plate adds heat at a constant rate.
Explained how to set up the lab and how to use the computers.
Two groups used the old fashioned thermometers.
In this lab you need to wear goggles so long as the hot plates are on and you need to use the stirring rod to constantly stir the water so it has a uniform temperature throughout.
It took so long to set up the lab that many students only finished at the bell. I ended up having to take down the equipment after class.
Students printed out their heating curves. We will discuss them next time.
Reviewed last Wednesday's class:
Phases of matter: solid, liquid, gas
Solids have a definite shape and a definite volume
Liquids have a definite volume but take the shape of their container
Gases take the shape of their container and fill the container.
It takes energy to go from solid--> liquid --> gas
In today's lab we are going to add heat using a hot plate to a mixture of ice water, melt the water, heat the water, and boil the water.
Hypothesis: In your lab notebooks, sketch your prediction for the heating curve for this experiment, Temperature on the y-axis and adding energy or time on the x-axis.
We will assume the hot plate adds heat at a constant rate.
Explained how to set up the lab and how to use the computers.
Two groups used the old fashioned thermometers.
In this lab you need to wear goggles so long as the hot plates are on and you need to use the stirring rod to constantly stir the water so it has a uniform temperature throughout.
It took so long to set up the lab that many students only finished at the bell. I ended up having to take down the equipment after class.
Students printed out their heating curves. We will discuss them next time.
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