Elizabeth Lee Hazen (1888-1975) and Rachel Brown (1898-1980) Narrow Your Results Refine Your Results Filter Your Results Expeditions Information Close Browse records and papers documenting scientific and collecting expeditions either affiliated with the Smithsonian, or with which Smithsonian researchers participated. Pre-set filters help narrow searches by geographic regions predominantly represented in expedition records. Smithsonian Secretaries Information Close Browse records and papers of the Smithsonian Secretaries, from 1846 until today. Smithsonian Museum & Research Centers Information Close Browse records and papers documenting the history and research of major Smithsonian divisions. Smithsonian Records Information Close Browse official records created at the Smithsonian Institution’s museums, research centers, libraries, and archives, now in the Smithsonian Institution Archives’ collections. Personal Papers Information Oral Histories Information Professional Societies Information Elizabeth Lee Hazen (1888-1975) and Rachel Brown (1898-1980) Title:
Nedeljnik Vreme Metaphorical Cell Group Work PLANETA magazin za nauku, istraživanja i otkrića ČASOPIS PLANETA Br 49 Jozef Baruhović, Milan Dimitrijević, Milan Đurić, Filip Franeta, Ibrahim Hadżić, Mirko Jakovljević, Branka Jakšić, Ilijana Jakšić, Zoran Janjušević, Nataša Jovanović, Vladimir Jovanović, Oliver Klajn, Nadežda Krstić, Dragan Lazarević Jelisaveta Lalić, Mirjana Lukić, Borka Marinković, Zoran Matić, Vladimir Milojević, Žaneta Miljanić, Darko Mladenović, Miloš Popović, Ilja Slani, Mićo Tatalović, Miomir Tomić, Gordana Tomljenović, Zdenko Štromar. Direktor: Milan Knežević Glavni i odgovorni urednik: Aleksandar Gaon Pomoćnik glavnog urednika: Miloslav Rajković Likovno-grafički urednik: Branka Savković Fotografije: Rade Krstinić Internet: Dragan Bogdanović IZDAVAČ I OSNIVAČ : "Belmedia" d . o . o .
Who wants to summarize using foldables??? I love foldables. They can take the most mundane of material and liven it up so that the kids are meaningfully engaged and learning. As the year has progressed, I find myself using more and more of these little pieces of paper in my classroom. My latest craze has been to use them in science. We are studying about Living Systems and how the human body and plants have similar traits. To wrap up our journey through the organs of the human body, I had the students create a foldable that included all of the different body systems we have learned about. When we moved on to plants,there were a lot of things that we had learned. And finally, instead of just having the students answer the questions in the back of the book, I asked them to use a foldable to do it. So there you have it.
THE EFFECT OF CONCENTRATION ON THE RATE OF DIFFUSION Lab: The Effect of Concentration on the Rate of Diffusion Free biology lab perfect for biology or life science students in grades 8-12 PURPOSE: This experiment will explore the concentration gradient by measuring the rate of diffusion in a number of theoretical cells. The objectives for this lab are: (1) To define concentration gradient (2) To explain experimental data concerning different concentration gradients (3) To complete a data table and prepare a graph to illustrate the data (4) To apply information from this experiment to other related problems. MATERIALS: 6 pieces of dialysis tubing, sucrose solutions of varying concentrations, String, Balance, 6 beakers or plastic cups, Stopwatch NOTE: This product is also included in a large, bundled unit lesson plan and can be viewed here: Cell Structure and Function Complete Bundled Unit Plan You might also be interested in: Cell Structure and Function Powerpoint and Notes Pre-Lab Worksheet for any Science Lab
Anatomia Vegetal Visualising the Cell Nucleus Leaf growth Cell growth Cell organelles and cytoplasm visualisation Cell membrane and cell wall growth Dicotyledon* stem cross-section Woody cells of conifer Monocotyledon* stem cross-section These fabulous botanical microanatomy plates constitute the total of illustrations present in 'Anatomia Vegetal' by Frederik Elfving (1929) and published by FE Wachsmuth (Leipzig) which is online at La Biblioteca Virtual de Patrimonio Bibliográfico from the Spanish Ministry of Culture. Elfving (1854-1942) was a professor of botany at the University of Helsinki. [via + via, plus all other points in between across the tumblr-verse]
Foldables in Science | Science for All This is not a science specific resource, however, as an elementary teacher of science and as a professional development provider I have used Foldables to help learners better understand science concepts. If you are new to Foldables, they are essentially folded paper used as a graphic organizer. There are many flavors of Foldables: Cause & Effect, Venn Diagrams, mini-books, and more. If you found this post by searching for science & foldables, I would ask that you check out some of my other posts and add this blog to your science education bookmarks. Some of my favorite Foldables resource sites are the following: Applications for Science Teachers: Foldables help students build understanding through the use of visual and kinesthetic interactions. Like this: Like Loading...
LAB: USING CABBAGE JUICE TO OBSERVE CO2 PRODUCTION IN CELL RESPIRATION Make your science class more fun and interesting by incorporating lab activities into your daily and weekly lesson plans. My students particularly love this lab because it uses red cabbage juice as an acid/base indicator to detect the carbon dioxide that is released during cellular respiration. Carbon dioxide is released during cellular respiration and is given off as a waste product. Purpose: 1. Materials List: Cabbage juice indicator, Test tubes, Drinking straws, Cotton balls, Graduated cylinder, Germinated peas, Dry peas, Rubber stoppers, Test tube rack, Dilute acid, Carbonated beverage Note: This product is also contained in a complete bundled unit plan and can be viewed here: Cellular Respiration Complete Bundled Unit Plan This lab is perfect for any biology or life science class that is studying cellular respiration. This lab is easy to set up and easy to take down, and does not require any fancy pieces of lab equipment. Lab: Measuring the Energy in Foods Test: Cellular Respiration
Lab: Gas Exchange in Respiration Gas Exchange in Respiration: Qualitative Observation of Carbon Dioxide Release It is the time of year for teaching photosynthesis and respiration to my biology students. I think that all biology teachers will agree that these are difficult concepts to teach to our students. Other than genetics, I think that the topics of photosynthesis and respiration may be my favorite topics to teach. I enjoy the chemistry aspects, and I especially enjoy sitting back and marveling at how beautiful these two processes are. Which do you teach first? It is so important to make sure that the students first have a firm grasp on the "big picture". Unfortunately, I have found it very difficult to find good labs to reinforce the concepts of respiration. If you have great lab ideas for respiration, I would love to hear them!
FREEBIE! Catalase - An Enzyme Common to Both Plants and Animals Great Lab Activity! Concepts covered: 1. Enzymes speed up the rate of biological chemical reactions. 2. 3. 4. 5. Introduction: Catalase is an enzyme that is commonly found in plant and animal tissues. Within cells, hydrogen peroxide is thought to be formed continually as an end product of biochemical reactions such as cellular respiration. Manganese dioxide is a catalyst. Materials needed: Fresh plant and animal tissue Test tubes and racks Boiled animal tissues Manganese dioxide 3% hydrogen peroxide solution Sand Mortar and pestle Catalase is an enzyme that is found in all eukaryotic cells. What reaction will students see as catalase breaks down the hydrogen peroxide? As you can imagine, students absolutely love this lab!! Also related: