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Unit 2: Astronomy

Unit 2: Astronomy. Unit 2 Astronomy. Agenda. In: What are models? Through: Notes on heliocentric and geocentric models Out: Venn Diagram TITLE: Scientific Models Page: Date: 2/19/13 Objective: Define scientific model Compare and contrast geocentric and heliocentric models.

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Unit 2: Astronomy

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  1. Unit 2: Astronomy

  2. Unit 2 Astronomy

  3. Agenda • In: What are models? • Through: Notes on heliocentric and geocentric models • Out: Venn Diagram TITLE: Scientific Models Page: Date: 2/19/13 Objective: Define scientific model Compare and contrast geocentric and heliocentric models.

  4. Scientific Models • A scientific model is a simplified representation of a theory or a concept • Models are used when it is either impossible or impractical to create experimental conditions in which scientists can directly measure outcomes.

  5. Scientific Models • Models can be used to explain observations and make predictions. • Models are generated by selecting the key ideas or features of a process in a logical manner. What do you observe about this water cycle model? Where can you predict rain will fall?

  6. Scientific Models • Can take the form of a diagram, physical model, or a mathematical equation.

  7. What is astronomy? • Astronomy is the study of the universe. • The Ancient Greeks contributed significantly to the understanding of the universe. They used philosophical arguments and observational data to explain natural phenomena.

  8. Geocentric Model • Invented by the ancient Greeks • The moon, sun, and other planets– Mercury, Venus, Mars, and Jupiter– orbit the earth • http://astro.unl.edu/naap/ssm/animations/ptolemaic.html

  9. Heliocentric Model • Nicolas Copernicus and Galileo proved the Geocentric model wrong • States that the Earth and other planets orbit around the sun • http://www.youtube.com/watch?v=iiBIFlvu-X0

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