Giant Organelle Project Method You and your partner will create a model of an organelle to scale. Your design must be complete and accurate. You will also plan a 5-minute lesson/discussion on your organelle. Presentations will occur INSIDE the giant cell. You must do the research on your own. Your presentations will be given on the day the organelle model is due (November 4A day, 5B day). Creating the Organelle The plant cell is a 3 m square. You have been provided with a chart of actual organelle sizes. You must, using ratios, calculate the size of your giant organelle so that it is proportionately correct for the giant cell. Remember that um stands for “micrometer”. There are 1000 um in 1 mm. You also need to research the function of your organelle in order to build it so that it can carry out its function in the giant cell. Then you will build your organelle. You will prepare a brief 5 minute lesson for the class. Lessons will include a discussion question to share with the class. Your organelle will be judged according to the accuracy of its size, the correctness of its details, your explanation of its function and your creativity. Architectural design plan: 1. Name of team: ______________________________________________ 2. Name of organelle: ________________________________________ 3. Equation for determining the dimensions of the giant organelle: 4. List of materials needed to construct the organelle: Material Use 5. Plan for division of labor among construction team: Worksheet A. How Big do I Need to Make my 3D model? 1. What is the magnification of our cell model? A. What is the actual dimension of a plant cell (see table below). B. How big is the magnified plant cell model? (300 cm square) 2. What are the ACTUAL dimensions of your organelle inside of an ACTUAL cell? _____________Actual dimension _____________Magnified dimension (your model) B. What information do I need to include in my presentation? 3. Details. What are the parts of your organelle? What is the function of your organelle? 4. Interesting aspects of your organelle. What do YOU find interesting? What happens in a cell if your organelle is defective? 5. Provide a discussion question for the class to consider. Cell or Organelle Average plant cell nucleus nucleolus mitochondrion chloroplast ribosome Endoplasmic reticulum Golgi apparatus Vacuole (central) microtubules microfilaments lysosomes Plasma membrane Size in um (1 mm = 1000 um) 30 um 7.5-10 um 2.5 um 1 um wide x 3-10 um long 2 um x 5 um 0.025 um 0.5 um thick; can occupy 10% of the cell; 2um x up to 6um 2 um x 20 um (membranes have the thickness of the ER) 50-80% of the total cell volume 0.02 um diameter 0.007 um diameter 0.2-2 um 0.009 um thick See the following as an excellent reference: http://publications.nigms.nih.gov/insidethecell/chapter1.html#11 These numbers are all approximate. The scale is most important. As long as you can justify your numbers (mathematically and with evidence/sources) and your scale makes sense, you will be successful. Rubric for Evaluation Points 30 Criteria Detailaccuracy of the model Unacceptable There is no model or the structural details are completely wrong Passing A few of the structural details are represented accurately Acceptable Most of the structural details are represented; some of them accurately Explanation of structure is good; very little reference to the model Competent All of the relevant structural details are represented; most are accurate Explanation of the structure is good; there is reference to the model 15 Quality of presentation & explanation Explanation of structure is incomplete; very little reference to model 15 Quality of presentation Explanation of the structure is inaccurate and incomplete; no reference to model made Presentation is unclear and does not cover requested information Presentation does not cover all of the material Presentation covers all relevant material; much of it is read Presentation covers all relevant material; very little is read 20 Individual participation Only 1 person in the group does the presentation; parts may not be connected One person does more than 70% of the presentation and parts are presented separately Some evidence of attempt to be creative but is not well executed One person does 6070% of the presentation and parts are presented separately One one of the following is present: Equal participation or connected parts There are several creative details in the model and report 10 creativity No evidence of creativity A few creative details in the model or report Excellent The structural details are well represented and very accurate Explanation of the structure and reference to the model are accurate integrated and clear Presentation covers all relevant material and is presented in a lively and interesting fashion Both people participate equally; parts are well connected The entire project shows evidence of creative thinking both creation of the model and presentation