Weather: Density, Temperature, and Fronts

In the final lesson of Chapter 10, students focused their learning of temperature and volume back on the concept of weather as it relates to warm and cold fronts and the formation of clouds.  We worked through the ChemCatalyst in the Lesson 55 PowerPoint and then watched a clip of Kenvin Delaney, Jimmy Fallon, and Lucy Liu experiment with matter of different densities:

Students then worked through the Lesson 55 Worksheet which calls for them to reference the Weather Variables worksheet from Lesson 49.  For homework, students were assigned textbook questions 1, 3, 4, and 5.

Central Dogma: Cystic Fibrosis Case Study

In today’s lesson, we used a case study about cystic fibrosis as the mechanism to:

  • review the stop codon;
  • connect the concepts of protein structure and function;
  • review how R groups differentiate amino acids;
  • review how R group interactions result in protein folding;
  • discuss “structure equals function”;
  • bring a human face to a genetic disease;
  • and help students recall the mechanism of genetic inheritance.

For the entry task, students were challenged to consider how genes begin and end.  We discussed how mRNA sequences always begin with AUG (which codes for methionine, and amino acid which may also occur elsewhere in a protein).  Students were then reminded of the three “stop codons” and we reviewed how those work to release a protein from the ribosome.  We reviewed the structure of amino acids, focusing on the 20 different R groups and how those R groups each have different properties.  The interactions between R groups determine protein shape, and shape determines protein function.  When the sequence changes, the shape changes, thus changing the function of a protein.  We then moved into the cystic fibrosis case study, first watching the video below and then working through the lesson PowerPoint.

Pictures from the white board today: