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Louis Pasteur & Germ Theory
Louis Pasteur & Germ Theory
Beliefs about disease in19th Century
Beliefs about disease in19th Century
Step 1: Discovery of Micro-organisms
Step 1: Discovery of Micro-organisms
Step 2: Improved microscopes
Step 2: Improved microscopes
Step 3: Louis Pasteur’s germ theory
Step 3: Louis Pasteur’s germ theory
Step 4: Germ theory vs spontaneous generation
Step 4: Germ theory vs spontaneous generation
Step 5: Linking micro-organisms to disease
Step 5: Linking micro-organisms to disease
Step 6: Proving the link between bacteria and human disease
Step 6: Proving the link between bacteria and human disease
Your Task
Your Task
This powerpoint was kindly donated to www
This powerpoint was kindly donated to www

Презентация на тему: «Louis Pasteur Germ Theory». Автор: Ben Leach. Файл: «Louis Pasteur Germ Theory.ppt». Размер zip-архива: 85 КБ.

Louis Pasteur Germ Theory

содержание презентации «Louis Pasteur Germ Theory.ppt»
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1 Louis Pasteur & Germ Theory

Louis Pasteur & Germ Theory

2 Beliefs about disease in19th Century

Beliefs about disease in19th Century

People knew there was a link between dirt and disease, but could not explain the link. People explained disease as seeds bad seeds in the air known as miasma. 1850s &1860s breakthrough in the cause of disease.

3 Step 1: Discovery of Micro-organisms

Step 1: Discovery of Micro-organisms

Anthony Van Leeuwenhoek made one of the earliest microscopes. Discovered micro-organisms which he called animalcules. Microscopes not as good as today.

4 Step 2: Improved microscopes

Step 2: Improved microscopes

1800s purer glass produced = better lenses for microscope. 1830 Joseph Lister develops a microscope which can magnify x1000

5 Step 3: Louis Pasteur’s germ theory

Step 3: Louis Pasteur’s germ theory

Old Theory: spontaneous generation micro-organisms are the result of decaying matter. New Theory: germ theory micro-organisms cause decaying matter. Pasteur showed you could kill the micro-organisms by applying heat - PASTEURISATION.

6 Step 4: Germ theory vs spontaneous generation

Step 4: Germ theory vs spontaneous generation

Pasteur now had to prove his theory. In competition with French scientist Pouchet. Conducted an experiment showing that microbes in the air caused decay. 1861 published his ‘germ theory’

7 Step 5: Linking micro-organisms to disease

Step 5: Linking micro-organisms to disease

Pasteur showed micro-organisms made wine and beer go bad. Could germs cause disease? Another experiment! Proved that a micro-organism was causing disease in silk worms.

8 Step 6: Proving the link between bacteria and human disease

Step 6: Proving the link between bacteria and human disease

Pasteur never showed the link between bacteria and human disease. This was left to Robert Koch

9 Your Task

Your Task

You need to create a flow chart with the title 6 steps to discovering the causes of disease. Use the slides to help you. For each step you must explain how this helped to discover the cause of disease. You cannot use more then three sentences per step. Additional information can be found on p.128 - 129 of the textbook.

10 This powerpoint was kindly donated to www

This powerpoint was kindly donated to www

worldofteaching.com http://www.worldofteaching.com is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching.

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