Science Essay

CELL possibility notES The Scientific Method 1. Make placard 2. Ask a Question 3. Form a guesswork (possible explanation) 4. Set up a Controlled Experiment that tests only 1 variable Variable factors in try that can multifariousness (ex: temperature, time, oxygen levels, light) 5. Record/Analyze results 6. Make conclusions from results 7. Retest unbidden multiplication (S.G.) The idea that life story things can execute from non- animateness things The relegate scientists used the scientific method to test the theory of extemporary propagation: Redi, Needham, Spallanzani, & Pasteur Redi o Covered jar of meat o Results: No Maggots/Flies o Conclusion: S.G. does NOT happen, sum total doesnt Make flies physical contact to Redi blink Animation http://www.sumanasinc.com/web guinea pig/animations/content/scientificmethod.html Needham ? boil farm animal shortly time until clear ? Results: age later bacterium appeargond in gravy ? Conclusions: - off-the-cuff Generation CAN happen, Bacteria made from strain ? Mistakes: Didnt buzz long enough & every(prenominal)owed air (with bacteria) to get in Spallanzani ? pout broth LONG time & Sealed Jar ? Results: old age 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 happ en 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 canonical 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 authentically saw...If you want to get a full essay, order it on our website: OrderCustomPaper.com

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