Chapter 10 Flashcards
in this system, the universe is a series of concentric spheres-spheres one inside the other. Earth is fixed, or motionless, at the center of these spheres. The spheres are made of a crystal-like, transparent substance in which the heavenly bodies, pure orbs of light, are embedded. This system is called geocentric because it put Earth at the center of the universe.
ptolemaic system
sun-centered (usually in terms of the universe)
heliocentric
this law explains why the planetary bodies do not go off in straight lines but instead continue in elliptical orbits around the sun. The law states, in mathematical terms, that every object in the universe is attracted to every other object by a force called gravity.
Universal Law of Gravitation
the system of thought that is based on the belief that reason is the chief source of knowledge. Problems can be solved using reason
rationalism
a systematic procedure of collecting and analyzing evidence. It was crucial to the evolution of science in the modern world. It was developed by Francis Bacon.
scientific method
a doctrine that scientists should proceed from the particular to the general by making systematic observations and carefully organized experiments to test hypotheses or theories, a process that will lead to correct general principles. Example: Newton’s laws of motion –> machine theory
inductive reasoning
greatest astronomer of the antiquity. He lived in the second century A.D. in Alexandria, Egypt. He used his ideas and the ideas of Aristotle and Christianity to create a model of the universe known as the Ptolemaic system. This is what the Church believed which is why it was accepted for so long.
Ptolemy
a Polish mathematician. His famous book On the Revolutions of the Heavenly Spheres was published in 1543. He felt that the geocentric system was too complicated. He believed that his heliocentric contraception of the universe was a more accurate explanation than the Ptolemaic system. He said that the planets revolved around the sun and the moon revolved around the earth. He said that the apparent movement of the sun around the earth was really caused by the daily rotation of the earth on its axis and the journey of the earth around the sun.
Nicholas Copernicus
an Italian scientist that taught mathematics. He was the first European to make observations of the heavens using a telescope. He discovered mountains on the moon, four moons revolving around Jupiter, and sunspots. He destroyed an aspect of the Ptolemaic system. In the Ptolemaic system, heavenly bodies had been seen as pure orbs of light, but he discovered that they were made of the same material substance as Earth. He published his discoveries in The Starry Messenger in 1610. It put him under suspicions by the authorities of the Catholic Church. The Church ordered him to abandon the Copernican idea because it threatened the Church’s entire conception of the universe and seemed to contradict the Bible. The heavens were no longer a spiritual world but a world of matter, and God was no longer in a specific place.
Galileo Galilei
He was born in 1642 and showed few signs of brilliance until he attended Cambridge University. He became a professor of mathematics at the university and wrote his major work, Mathematics Principles of Natural Philosophy. It is simply know as the Principia, by the first word of its Latin title. The first book of the Principia defines the three laws of motion that govern the planetary bodies, as well as objects on Earth. Crucial to this argument was the universal law of gravitation. He had shown that one universal law, mathematically proved, could explain all motion in the universe. This idea created a new picture of the universe. It was now seen as one huge, regulated, uniform machine that worked according to natural laws. This world-machine concept dominated the modern worldview until the twentieth century, when Albert Einstein’s concept of relativity created a new picture of the universe. “Father of modern physics”
Isaac Newton
one of the first scientists (chemist) to conduct controlled experiments. His pioneering work on the properties of gases led to Boyle’s Law. This generalization states that the volume of a gas varies with the pressure exerted on it.
Robert Boyle
one of the most prominent female scientists of the seventeenth century. She came from an aristocratic family of England. She wrote a number of works on scientific matters, including Observations Upon Experimental Philosophy. In her work, she was especially critical of the growing belief that humans, through science, were the masters of nature.
Margaret Cavendish
the most famous of the female astronomers in Germany. She received training in astronomy from a self-taught astronomer. Her chance to be a practicing astronomer came when she married Gottfried Kirch, Prussia’s foremost astronomer, and became his assistant. She made some original contributions to astronomy including the discovery of a comet. When her husband died, she applied for a position as assistant astronomer at the Berlin Academy. She was highly qualified, but as a woman with no university degree, she was denied the post. Members of the Berlin Academy feared that they would set a bad example by hiring a woman. Her problems with the Berlin Academy reflect the obstacles women faced in being accepted as scientists.
Maria Winkelmann
a seventeenth-century French philosopher. He began by thinking and writing about the doubt and uncertainty that seemed to be everywhere in the confusion of the seventeenth century. He ended with a philosophy that dominated Western thought until the twentieth century. The starting point for his new system was doubt. In his most famous work, Discourse on Method, written in 1636, he decided to set aside all that he had learned and to begin again. He emphasized the importance of his own mind and asserted that he would only accept those things that his reason said were true. He has been called the father or modern rationalism. “I think therefore I am”
René Descartes
an English philosopher with a few scientific credentials who believed that instead of relying on the ideas of ancient authorities, scientists should use inductive reasoning to learn about nature. He developed the scientific method. He wanted science to benefit industry, agriculture, and trade.
Francis Bacon
the intellectuals of the Enlightenment were known by this French name meaning “philosopher.”
Philosophe