Exit Task

Our mini-unit began with a brief silent video introducing the Gas Laws.  Students were tasked with making written observations and then we held a class discussion and produced a chart of what they Know, Think They Know, and Need to Know.  Next, students were introduced to Robert Boyle, one of the great chemistry scientists from history who contributed greatly to our understanding of Gas Laws. The video can be accessed by clicking here and using the passcode provided in class.

The lesson concluded with an activity in which students worked in groups to simulate the movement of gas molecules, calculating how a change in variables (temperature, volume, and pressure) affects the rate of molecule collisions.

For the final 10 minutes of class, students completed the 1st Semester Reflection (Exit Task) and received back their graded Unit 2 Exam.

Updated 1/30 – For the second day of the lesson, we reviewed the gas laws and reviewed basic algebra skills to help prepare for making calculations with the gas laws.  Class notes are shown below, and the slide deck with important definitions covered thus far are available as a PowerPoint (unit 3 vocabulary).

Daily Deliverables Due Friday:

• Robert Boyle Video Notes (worksheet)
• Gas Laws Lab Data and Analysis (worksheet)
• 1st Semester Reflection (Exit Task)

Extend Your Learning!

Notes from the January 22 review:

Day 2 Review:

Our review today consisted of a Kahoot! which covered the 20 multiple choice questions from the unit 2 review section in the textbook, followed by a review of functional group structures and smells.  Notes from the whiteboard are pictured below:

The final lesson of Unit 2 explores how amino acids connect to make proteins.  The Lesson 48 PowerPoint includes the vocabulary terms of amino acid and protein.  Lesson 48 connects with Lesson 47, as amino acids are chiral molecules.  Notably, all of the 20 different amino acids in human proteins are “left-handed” (as opposed to the mirror-image “right-handed” isomers), meaning they all have the L conformation (L for laevus, Latin for “left”) rather than the D conformation (D for dexter, Latin for “right”).  Students will work in pairs to complete the Lesson 48 Worksheet, learning about the properties of amino acids and how they bind together to form proteins.  For more on the D and L convention, click on the picture below.

As noted previously, there are 20 different amino acids.  All amino acids share the same base structure of a central carbon atom bound to a carboxylic acid (-COOH), an amino group (-NH2), and a hydrogen (H).  The central carbon is also bound to an R group, with R indicating any one of the 20 different amino acid structures.  The structures each have different physical properties.  When individual amino acids link together, a polypeptide chain is formed (and a molecule of water is removed as each new amino acid is linked to the chain).  The polypeptide chain, composed of a string of amino acids, folds into a particular shape determined by the interactions of all of the amino acids.  The shape of a protein determines its function in the body.  Mr. Anderson of Bozeman Science has a fantastic video explaining the nature of proteins:

For students looking for a good review of Central Dogma (DNA > RNA > Protein > Trait), the Crash Course Biology video DNA, Hot Pockets, & The Longest Word Ever is a good resource:

Finally, for students with access to a home computer, the Fold.It website will have you folding proteins in no time!

Homework:

• Read Lesson 48 in the textbook.  Login via hs.saplinglearning.com and enter your username and password:
  • Username: wahps****s-####### (**** = first 4 letters of your last name and ####### = student number).  Remember to include the dash between s and #.
  • Password: S-####### (the S must be capitalized)
• Write notes for Lesson 48 on the Chapter 9 Notes handout.
• Work through the practice problems at the end of Lesson 48.
• Please ask questions about anything from Lesson 48 you do not yet fully understand.