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The Scientific Revolution
Revolutionary Astronomers
Causes of the Scientific Revolution
The Scientific Revolution was a time period in which Europeans made major scientific and technological advancements.
There are may reasons for the Scientific Revolution:
• Renaissance created a spirit of curiosity & rebellion against authority
• Humanism promoted scientific inquiry
• The power of the Church & its views were weakened due to the Reformation
• OLD IDEAS:
• Geocentric Theory: The earth was an immovable object & the universe revolved around the Earth
• Geocentric theory dated back to Greeks, about 500 BCE
• Church supported geocentric theory
The Geocentric Universe
A New Way of Thinking
Beginning around 1550, European Scholars began publishing works
that questioned traditional scientific beliefs
Invention of the printing press & better methods of travel spread new
ideas rapidly
Heliocentric Theory:
Nicolaus Copernicus argued that geocentric theory was not backed by
scientific proof
Reasoned that the celestial bodies (planets & stars) revolved around
the Sun, not the Earth
Johannes Kepler using Copernicus & Brahe theories developed the
idea that the celestial bodies revolve in an elliptical orbit &
mathematically proves Copernicus’ theories
Galileo Galilei develops the telescope & validates Copernicus’ &
Kepler’s ideas
The Heliocentric Universe
Galileo’s Telescope
Scientific Method The Scientific Method is the logical procedure for gathering & questioning
data
Steps in the Method:
Begin with a problem or question
Form a hypothesis, or an unproved assumption
Test hypothesis using an experiment, observing & collecting data
Using observations & collected data, analyze & interpret date to validate or create a new conclusion
The People Behind the Scientific Method:
Francis Bacon: English philosopher who said that scientists should not rely too heavily on Greek & Roman ideas but create new ones based on experimentation
Rene Descartes: French philosopher who believed that knowledge comes from questioning, observing, & using reason to deduce a new “truth”
said that everything should be doubted
Only truth is that “ I exist”
Creators of the Scientific Method
Newton’s New Law
Mid 1600s, Isaac Newton studying mathematics & physics
at Cambridge University
Studied the theories of Copernicus, Kepler, & Galileo
Determined that all objects were acted upon by the same forces
Created the Law of Universal Gravitation
Every object in the universe attracts every other object
The degree of attraction is dependent on the mass of the object
Publishes The Mathematical Principles of Natural Philosophy
Describes the universe as a giant clock whose parts all work
together perfectly in ways that can be expressed thru
mathematics
Isaac Newton
Scientific Revolution Spreads Biological & Anatomical Advancements:
Zacharias Janssen invents the first microscope
Anton van Leeuwenhoek uses Janssen’s microscope to observe
microscopic organisms (bacteria) living in tooth scrapings/first to
examine red blood cells
Andreas Vesalius:
published first comprehensive study on human anatomy (7
volumes) On the Fabric of the Human Body
proved the theory that all mammalian anatomy was similar
William Harvey
Diagrams and explains the circulatory system
Determines that the heart is the blood-moving organ
Edward Jenner introduces first vaccine to prevent a disease
(Small Pox) using a live culture from the “cow pox” virus
Andreas Vesalius’ Drawings
Scientific Revolution Spreads Advancements in Physics:
Evangelista Torricelli develops first barometer to measure atmospheric pressure
Gabriel Fahrenheit develops temperature scale where water freezes at 32° /boils at
212 °
Anders Celsius creates another temperature scale setting freezing point at 0°/boils
at 100 °
Chemistry Advances:
Robert Boyle
challenges Aristotle's idea that all things are composed of only four elements/
proposes that matter was made up of smaller primary particles
Development of Boyle’s Law that explains how volume, temperature, &
pressure affect each other
Joseph Priestly discovers the element Oxygen
Antoine Lavoisier
Names the element Oxygen
Establishes the Law on the Conservation of Matter – matter can be neither
created or destroyed, can only change states.