Science Essay

CELL hypothesis notES The Scientific Method 1. Make note 2. Ask a Question 3. Form a shot (possible explanation) 4. Set up a Controlled Experiment that tests only 1 variable Variable factors in try that can channel (ex: temperature, time, oxygen levels, light) 5. Record/Analyze results 6. Make conclusions from results 7. Retest unbidden contemporaries (S.G.) The idea that life story things can commence from non- alive things The spare-time activity scientists used the scientific method to test the theory of off-the-cuff generation: Redi, Needham, Spallanzani, & Pasteur Redi o Covered jar of meat o Results: No Maggots/Flies o Conclusion: S.G. does NOT happen, aggregate doesnt Make flies physical contact to Redi burgeon forth Animation http://www.sumanasinc.com/web guinea pig/animations/content/scientificmethod.html Needham ? turn farm animal shortly time until clear ? Results: geezerhood later bacterium appeargond in gravy ? Conclusions: - offhand Generation CAN happen, Bacteria made from parentage ? Mistakes: Didnt boil long enough & every(prenominal)owed air (with bacteria) to get in Spallanzani ? grizzle broth LONG time & Sealed Jar ? Results: long time later until now NO bacteria ? Conclusions: Broth does NOT make bacteria, S.G. does NOT happen ? Critics said... you lead air for Spontaneous Generation.

CELL THEORY NOTES Pasteur ? use swan-necked flask so air can get to broth ? Boiled broth for long time ? Microbes got stuck in bend ? Results: No microbes appeared in broth ? Conclusions: o broth does NOT make bacteria o S.G . does NOT happen o All living things must ! come from other living things! Link to Pasteurs Experiment Flash Animation http://bcs.whfreeman.com/thelifewire8e/content/cat_010/0304003.html CELL THEORY 1. All living things are made of cells 2. Cells are the radical functional unit of all living things 3. All cells come from existing cells LEEUWENHOEK 1st to see living cells motto in pond water ROBERT HOOKE Used light microscope to discover cells actually saw...If you want to get a full essay, order it on our website: BestEssayCheap.com

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