Friday, Feb 6, 2009 - Block 4A

Went around room and asked students what they told their parents about what they did the last class.

Asked if students had tried the Quia activities on waves.

Quiz on "Name That Sound"

Handed out Lab Sheets for "Show Me A Wave"
Students wrote names on sheets.
I assigned groups and explained the lab.
Do NOT let go of the slinky or it can get tangled.
Keep the slinky on the ground, NO up and down waves.
Leave enough space so that you do NOT tangle your slinky with others.
If you tangle the slinky and I cannot fix it easily, the cost to you is $10

In groups of more than two, swap off so everyone can make the waves.

On the back of the lab sheet, sketch the waves for numbers 1, 2, 20 - 23
For 1 - Sketch a transverse wave. Label the peak, trough, wavelength, amplitude
For 2 - Sketch a longitudinal wave. Label the compression, rarefaction, wavelength
Sketch 20-23 and label the nodes and antinodes.

Did lab in hallway. Afina and I went around and asked students to show us the various waves.

Came back into the classroom. Handed out Yellow Books and Reading Assignment 11.1. Students worked on it for most of the rest of the period.

Towards the end of the period I asked students to write in their notebooks a summary of the day's activities and get the notebooks stamped.

I also reviewed the content objectives and said there might be a quiz next period on the material.
Content objectives:
Student will be able to:
. Longitudinal and transverse waves
. Identify crest, trough, wavelength, compression, rarefaction and correctly associate these with the correct waves.
. Describe the differences between amplitude, wavelength, and frequency
. Explain the relationship between frequency, wavelength, and energy
. Identify nodes and antinodes in a standing wave