Students will learn about how the DNA molecule copies itself and reinforce this process.
Students will work in groups of three to simulate the structure of the DNA molecule as well as the replication process by using colored paper clips to demonstrate their understanding of this crucial process that occurs prior to cell division.
Students will learn and reinforce the process of figuring out how to determine the empirical formula that is based upon the percent composition of the chemicals in a compound.
Note that the percent composition is basically a prior knowledge since it was learned in Chemistry 1 on page 87 last semester. Nonetheless, it will be reviewed as a reinforcement or a precusor to determining the empirical formulas of several compounds.
We will discuss and reinforce the process of DNA replication and its importance in cell division. Furthermore, for a project to be due next week, students will have an opportunity to construct and present a model of a DNA molecular structure as well as be able to explain its replication process.
Since several students in the 2nd and 3rd hours performed poorly on the test for mole-mass conversion, these two classes will be given an opportunity for a retake.
Those individuals who performed very well or above average will have the choice to opt out. They will use the time to read about our next topic on pages 341-346, which entails percent composition and empirical formula as a preview to our class discussion once the other students finish doing their retakes.
We will discuss the structure and the importance of the DNA molecule as it was put forth Watson and Crick who based their work upon the X-ray diffraction’s of Rosalind Franklin, who was able to recognize that the DNA molecule is a double helix in nature.
Students will solve more problems on mole-mass conversions as a further practice as students who performed poorly will have the option to do a retake!
Students will reinforce the discovery of the DNA by elaborating further upon the works of Griffith, Avery, & Hershey-Chase.
Since students are having a test on mole-mass conversions on MONDAY, students are advised to practice further on page 360, do #’s: 133, 134, & 135 as well as on page 359, do #’s: 108 & 109.
Students are to make a 3-column T-Chart that is based upon the scientific work that was put forth by Frederick Griffith, Oswald Avery & colleagues, and Martha Chase & Alfred Hershey.
In the first column, the students will state the objective(s) of the scientists’ experiments. In the second column, the students will summarize the procedure/experiment that was carried out by each. In the third column, the students will state the conclusion(s) of each experiment of these scientists.
Student are to practice on finding the mass of a compound and be able to convert it to moles. Students are to do #34 on p. 335 and #40 on p. 337
