Week of March 20, 2017

This is the final week of the third quarter grading period, so please check your assignments and grades on PowerSchool. All late work is due by Wednesday for partial credit. (Those who are have been absent in the past few days should see me to plan for your due dates.)

This Week in Physics
On TUESDAY we will quiz over circular motion (unit 6 goal set 1) as covered in unit 6 podcasts 1 & 2. (First period: This is different from what I told you in class. I was a LIAR! It’s Tuesday.) If you have not completed goal set 1, be sure it is done by Monday. You may find the Centripetal Force Awesome Rock ‘n’ Roll Song to be helpful if you listen to it a few times and learn the lyrics. Following the quiz we will quickly go through the material from PODCAST 3: Gravitation & Planetary Orbits to prepare for assignment 2, which we will do together in class. Because we will go over the material on gravity so quickly, it is imperative that you take notes on the very short podcast if you have not yet done so. We will also do an online lab on planetary motion and then will take the unit 6 test on Wednesday or Thursday. This will be the last grade for third quarter, so if you are absent on Thursday, please be ready to take the test on the day that you return. (If you are absent on Wednesday, as well, you may have until Monday to take the test.) END OF COURSE TEST: This comprehensive test covering material from all six units we’ve studied this year will take place on Wednesday, March 29.

Cool Science of the Week
A classic sign of warm weather is the monarch butterfly, whose population worldwide just twenty years ago was over one billion. Sadly, due to deforestation (chopping down the world’s forests to make way for agriculture) and climate change, the population of monarch butterflies today is just 10% of its 1996 numbers. Just 10%! Consider that. Why does it matter beyond simply being sad? Scientists watch populations of small animals such as insects and amphibians in part because these animals are more responsive to environmental changes than we are, and therefore they are harbingers of changes that may affect humans.