Evolution: Retroviruses, Pseudogenes, and Transposons

Occasionally we need to learn content that involves a lecture-style delivery with students taking lots of notes.  Today was one of those days.  The PowerPoint includes content as well as links to the videos we watched.  Briefly, students were introduced to Linnaeus, Lamarck, and Darwin for some background information on how our understanding of evolution has changed over time.  We then transitioned into learning about concepts that help explain how the DNA available to an organism can change over time, and how changes in DNA can be used as a tool to track the relationships between species.  The videos embedded in the PowerPoint are also provided below:

Toxins: Avogadro’s Number

For Lesson 76, students gained practice working with scientific notation in the context of Avogadro’s Number (really big numbers) and the mass of small numbers of particles (really small numbers).  We began class by working through part B of the ChemCatalyst from Lesson 75.  Notes from the work are shown below:

We then transitioned into the Lesson 76 Worksheet (we did not use the Lesson 76 PowerPoint but it is provided here for reference).  We worked through some of the table on page 2 of the worksheet, and then students used the remainder of the class period to work together to complete the worksheet.  For homework, students were assigned to complete any 3 problems from the textbook.