The Scientific Revolution 9 th Grade World History

What exactly is a Revolution? A revolution is an event that demonstrates a change. Think of it this way…. The Earth Revolves around the sun. As it does throughout the year, the seasons Change. The Scientific Revolution was a change in the way of human thinking.

When did this change occur? Following the Renaissance, from roughly During the Renaissance, the philosophy of Humanism encouraged philosophers and artists to study the physical, natural world around them. This study of “natural philosophy” became a focus on sciences such as physics, astronomy and biology.

How was this a scientific revolution? During the Middle Ages and Renaissance, philosophers had studied the classical thinkers (Aristotle, Socrates, etc.) and accepted their ideas without questioning them. Philosophers and Scientists decided to break away from classical ideas, and use their own observations and experiments to understand the world.

It all starts with astronomy Before the Scientific Revolution, the accepted theory about the universe was the Ptolemaic Universe. Ptolemy was an ancient philosopher who theorized that the earth was the center of the universe. (Geocentric) The universe is a series of concentric spheres (same center) one inside the other with the Earth at the center.

Contradictions from Copernicus Believed Ptolemy was wrong. Studied an ancient Greek theory that the SUN was the center of the universe. Heliocentric THEORY He even dedicated the book to the Pope.

Questions from Copernicus So if Copernicus was right that would mean…. 1. The universe was much larger than originally believed. 2. The earth was just another planet. 3. We had NO idea where heaven is! (gasp!) Copernicus’ ideas made everyone stop and think….maybe they were wrong…..maybe the church was wrong!

Kicking off with Kepler Very good at math, he believed the key to understanding the universe was to use mathematics. Believed there was a mathematical relationship between everything in space.

Kepler’s 3 laws: 1. All planets travel in an elliptical orbit. (egg-shaped) 2. A planet gains speed as it gets closer to the sun. 3. There is a connection between the distance a planet is from the sun and the time it takes to orbit the sun (pluto takes longer than earth) All of these mathematical conclusions proved Ptolemy wrong.

Getting in trouble with Galileo Galileo decided to explore ideas about motion. Rather than speculating (guessing or theorizing) about his ideas, he actually experimented with them. For example: Galileo would roll balls down pieces of wood to show that an object in motion stays in motion until acted upon by a force. (Law of Inertia)

Inspiring the Inquisition Galileo used the telescope to observe several new phenomena in space: 1. That the moon is cratered and uneven, not perfect. Material substance not just pure orbs of light. 2. Moons were orbiting Jupiter; This meant that there was more than one center of motion in the universe. 3. Venus went through phases just like the moon, which meant it went around the sun. All these discoveries contradicted the Aristotelian and Ptolemaic ideas, angering the church.

Fun facts about Galileo Author of a book that was banned by the church as heretical. Placed on house arrest for his teachings. Still considered the most successful scientist of the Revolution. Named the moons of Jupiter after the Medici family.

Y.T.T.W. Do you feel Galileo should have taken his words back or not? How would you have acted in his situation? Is your life more important than your beliefs?

“If I have seen further, it is by standing on the shoulder’s of giants.” Isaac Newton was inspired by the work of Copernicus, Brahe, Kepler and Galileo. The printing press allowed Newton access to the ideas of these thinkers and the classics. Newton used their many philosophies to create a major work on physics.

Sir Isaac Newton English scientist, very advanced in math and physics. Believed the universe operated on a set of mathematical principals (facts) that could also prove the existence of God. Believed God was rational, therefore humans were also rational (able to make sense of the world).

Gravity Law of Gravitation- Every object in the universe is attracted to every other object by a force called gravity. Gravity- Could explain all motion in the universe. God created the universe but other factors controlled it…….gravity

The Religious Reaction New scientific ideas were a challenge to the authority of the church. They used the Bible to prove their points and ideas. Many scientists were considered heretics, and many became atheists because of this. Galileo, for example, was put on house arrest for his ideas.

Banning the Books In 1616, the Catholic Church created a list or “Index” of banned books that contradicted the ideas of the church. Those written by Newton, Copernicus, and Galileo were included in the list.

Botany and Biology Many other sciences experienced scientific revolutions. Before the S.R, Galen, an ancient Greek physician, was the believed authority on human anatomy. Dissection and experimentation by people like Leonardo Da Vinci (to create more lifelike work) and Andrea Vesalius proved much of his work wrong. Vesalius’ book, “On the Fabric of Human Anatomy” became the main book on the human body.

Royal Support Many kings and queens became patrons of the scientific revolution. Why? 1. To lower the authority of the church, which monarchs struggled against. 2. To aid in things like exploration and navigation to find new lands. Queen Elizabeth of England established a school at Oxford for the study of math and navigation.

Scientific Philosophers The scientific revolution didn’t just change knowledge, it changed how people gained their knowledge. Rather than just accept ideas and create theories, the S.R. was about testing, experimenting and proving ideas.

Rene Descarte Considered to be the first modern philosopher. Thinking and writing about doubt and uncertainty Accepted only those things his reason said were true.

Sense over Senses Descarte believed that human senses used in observation can be tricked or deceived. Believed that God was good and NOT trying to trick us so therefore the world could be understood through logic. Rationalism-system of thought is based on the belief that reason is the chief source of knowledge.

“I think (doubt) therefore I am” Cogito ergo sum This is how Descarte used reasoning/logic to explain his existence and that of God. For example; if he doubts that there is a god, he is acknowledging that god does exist if he can actually doubt him!

Sir Francis Bacon Different from Descarte Believed that to gain knowledge you need empirical evidence (proof). Believed human reasoning without proof could be flawed because many different things could affect or taint human knowledge. A good scientist would study, record data, analyze it and make observations. Inductive Reasoning This became the scientific method.

The Scientific Method Observation Create a hypothesis or theory Make a prediction about a test Experiment to prove your theory. Science became the new worldview during the S.R.

Effects of the Scientific Revolution Knowledge was no longer based on the past, but was moving forward. Systematic procedure for collecting and analyzing evidence.