22 January Science 8 Reflection on Carbon presentations; Reading about Fermentation, Respiration, Metabolism;

  1. Review DSN entry from last class. http://rfrazier.msblogs.aes.ac.in/2018/01/18/18-january-science-8-presentations-on-carbon-and-carbon-cycle-respiration-fermentation-metabolism/
  2. Read today’s blogpost.
  3. Prepare DSN entry for today.
  4. Be sure that this reflection is completed:

*To what extent did our study of matter in Semester 1 prepare you for looking in more detail at Carbon, Carbon Chemistry, and the Carbon Cycle? Write a thoughtful response in the reflection section of your DSN entry for today–especially in relation to the ideas about learning in Lessons from Thin Air and the concepts about carbon in the other presentations.

5. One group has not uploaded their Carbon presentation. https://drive.google.com/drive/folders/18eJpR4pSfCB6x2cZpox4HgTL9u8BsdTy?usp=sharing

6. Review Carbon presentations from other classes in your own presentation groups. As a group send an email with content-based questions to the two corresponding groups. Seek clarification. Please do not pose any negatively critical questions.Compare your presentation thoughtfully with their. Include me, Dr. F, in the email. Each member of your group and each member of the group whose presentation you review. (You will need to send two emails).

7. As a group–same Carbon presentation groups read and discuss the following information about respiration, fermentation, metabolism. Carry out this reviewing, analyzing, and clarifying with the same high quality you used for the Carbon presentation.

Earlier in the year we talked about how food is both fuel and building material. In our study of matter, we looked at the conservation of mass. This meant taking the atoms at the beginning of a reaction and seeing how they are transformed into products at the end of the reaction. Every living thing takes in matter and gives out matter in a different form. In the process energy is also transformed. See the scientific claim about how a molecule whose bonds store energy is used by yeast and is then transformed into products which are expelled from the cell. The claim is stated in the two-step reaction equations. Of course, you need to pay close attention to the reaction equations.

  • Sucrose is converted to 2 molecules of glucose/fructose.
  • 1st step C12H22O11 + H2O + invertase → 2 C6H12O6

Glucose/fructose is converted to 2 molecules of ethanol and 2 molecules of carbon dioxide.

  • 2nd step C6H12O6 → 2 C2H5OH + 2 CO2  

  • (below: glucose, fructose, ethanol)





Related terms: Respiration, metabolism, fermentation, cellular respiration, aerobic respiration, anaerobic respiration

All of these terms refer to the myriad chemical reactions involved in “life” and based on carbon.

Many sets of reactions use carbon based molecules for fuel (energy) and for building material. In these processes one important end-product is carbon dioxide.

8.   See the following link to *Lives of a cell* by Lewis Thomas. This is a significant example of science writing for the general (educated) public. This work just preceded Primo Levi’s Periodic Table that you read or hear about in the Carbon presentations.

As a group pick out one of the chapters to read. Be prepared to share your reading through an annotation: full bibliographic information, description, summary, assessment, reaction. Learning to write good annotations is a skill you will need and use in your human impact project. Do this one together as a group. Be sure that each member has this sample annotation of one of the chapters from Lives of a Cell in her/his digital science notebook.



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