FRANCESCO REDI SCIENTIFIC METHOD Marwa AlMarzooqi – H00233649Aysha AlBalooshi – H00237246

Early Childhood Education – semester 6

LSH 2203 Critical ThinkingMaureen Szulczewski

19th March 2015

Introduction • Francesco Redi:• Born Feb. 1626, Arezzo, Italy• Died March 1697, Pisa

• Italian physician and poet.

• Acquired a degree in medicine and philosophy from the University of Pisa.

• One of the first to disprove spontaneous generation.

• Maggots in meat came from flies’ eggs.

Aysha

The Problem : Spontaneous generation• Meaning:• The sudden appearance of some organisms. • Life naturally developed from non-living matter.

• Example: • Maggots arose from meat.• Mice from the grain.

• Video:• https://www.youtube.com/watch?v=WNByRghR6sw

Marwa

The Problem : Redi’s Hypothesis • Hypothesis: • New organisms produced only by existing organisms.

• Redi’s question: • Where do maggots come from?

Aysha

Redi’s Experiment• Observed: • Maggots appear where flies had previously landed. • Flies coming from maggots.

• Noticed and described: • The different developmental forms of flies.

• Proposed a new hypothesis: • Maggots came from eggs that flies laid on meat.

• Experiment:• Putting meat into three separate jars.

Marwa

Redi’s Experiment

•Step 1

• Jar-1

• Left open • Maggots developed

Aysha

Redi’s Experiment

•Step 2

• Jar-2

• Covered with netting • Maggots appeared on the netting

Aysha

Redi’s Experiment

•Step 3

• Jar-3

• Sealed • No maggots developed

Aysha

Analysis and Theory• The experiments shows:• Maggots and flies arise from living parents.

• Other scientist:• John Needham, from England:• Life had been created from nonlife.

• Lazzaro Spallanzani, an Italian scientist:• Boiling kills any living organisms. • Consequently, there were no living organisms give rise to new ones.

• Louis Pasteur, a French scientiste:• The microorganisms reproduce and give rise to many others like themselves.

• Theory:• Life did not arise from nonlife.

Marwa

Spallanzani and Pasteur Experiments:

Marwa

Effect of Discovery• At Redi’s time:• people didn’t believe in his experiment.

• Years later:• Pasteur insured that spontaneous generation was totally wrong by

his experiment.

• The significance of the discovery:• That there is no organism come from non-life organism

Aysha

References

AmoebaMike. (2009, October 6). Spontaneous generation: a brief history of disproving it. |

amoebamike. Retrieved from

https://amoebamike.wordpress.com/2009/10/06/spontaneous-generation-a-brief-history-

of-disproving-it/

Biogenesis vs. spontaneous generation. (2014, September 21). Retrieved from

http://www.slideshare.net/cavalierem/biogenesis-vs-spontaneous-generation

Childofthecornx. (2006, February 23). Biology notes: unit 4 lesson 1. Retrieved from

http://childofthecornx.livejournal.com/19219.html

Did man get here by evolution or by creation? (n.d.). Retrieved March 14, 2015, from

http://www.strictlygenteel.co.uk/evolution67/evolution3.html#

Francesco redi - biography, facts and pictures. (n.d.). Retrieved March 10, 2015, from

http://www.famousscientists.org/francesco-redi/#

Francesco Redi. (2015). In Encyclopædia Britannica. Retrieved from

http://school.eb.com.ezproxy.hct.ac.ae/levels/high/article/334292

Lynch, T. (1998). Redi experiment. Retrieved March 12, 2015, from

http://faculty.sdmiramar.edu/dtrubovitz/micro/history/Redi.html

Life. (2015). In Encyclopædia Britannica. Retrieved from

http://school.eb.com.ezproxy.hct.ac.ae/levels/high/article/106478#279371.toc

Moulton. (2004). Origin of life: spontaneous generation. Retrieved March 14, 2015, from

http://www.infoplease.com/cig/biology/spontaneous-generation.html#

Moulton, G. E. (2004). The complete idiot's guide to biology. Indianapolis, IN: Alpha.

Olsen. (2014). Spontaneous generation | professor olsen @ large. Retrieved from

https://diogenesii.wordpress.com/tag/spontaneous-generation/

Spontaneous generation. (2015). In Encyclopædia Britannica. Retrieved from

http://school.eb.com.ezproxy.hct.ac.ae/levels/high/article/69208

spontaneous generation experiments . [Art]. In Encyclopædia Britannica. Retrieved from

http://school.eb.com.ezproxy.hct.ac.ae/levels/high/article/69208/media?

assemblyId=143729

Spontaneous generation from evolution: the grand experiment, book and video series [Video

file]. (2009, August 12). Retrieved from https://www.youtube.com/watch?

v=WNByRghR6sw

Watch Tower Bible and Tract Society of Pennsylvania. (1967). Did man get here by

evolution or by creation? New York: Watchtower Bible and Tract Society of New York.