CorSci

• Diurnal - Daily motion. 24 hours
• Annually - Different times of year. The path takes across heavens is called ecliptic. constellations sun passes through are zodiac constellations
• Geocentric Model - The earth is at the center of the universe.
• Aristotle and Plato - –Earth and the heavens as spherical.
• Pythagoras - Everything moved around the Earth.
• HOMOCENTRIC & CONCENTRIC MODEL - the universe was composed of earth, five other planets. proposed by EUDOXUS
• HELIOCENTRIC MODEL - The sun is at the center of the Universe
• ARISTARCHUS & COPERNICUS - He proposed that the Sun and the fixed stars were at rest, while Earth revolved around the Sun along a circular path.
• PTOLEMAIC MODEL - planets move around small circles (epicycles) which themselves move around larger circles (deferent) centered (not quite) on the Earth. proposed by PTOLEMY
• GEOHELIOCENTRIC - Earth was the center and the sun and the moon revolved around it, and all the planets orbited the sun.
• MOTION -movement or change in location of an object over time. It is often described in terms of direction, location, and speed.
• Aristotle – whose theory was based on 4 primordial elements.

  a. fire – the highest position

  b. air

  c. water

  d. earth – the lowest position

  HEAVY OBJECTS FALL FASTER THAN LIGHT ONES.

  object made of earth “IT SEEKS ITS NATURAL PLACE.”

  NO MOTION WITHOUT FORCE
• Galileo - whose theory was based on quantitative methods of measurements.

  THE TWO OBJECTS STRUCK THE EARTH AT THE SAME TIME.
• Newton – Newton’s law of motion and Universal gravitation
• Law of Conservation of Energy - states that total energy is constant in any process. It may change in form or be transferred from one system to another, but the total remains the same.
• Law of Conservation of Momentum - momentum after the interaction is the same, it means that the momentum was conserved.