2Before 1500To determine what was true/false people turned to ancient Greek/Roman authors or the Bible.
3Geocentric Theory Earth-centered view of the universe Earth was an immovable objectEverything else moved around the Earth
4Aristotle Greek philosopher of the 4th century BC Developed the Geocentric Theory
5Ptolemy Greek astronomer of the 2nd century AD Expanded the geocentric theory which was also supported by Christianity
6Scientific Revolution A new way of thinking about the natural world based on natural observation and willingness to question accepted beliefsMid 1500sChallenged the ideas of the ancient thinkers and the churchReplaced old assumptions with new theories