Physical Science Quiz 2

• Constellations - sky into groups of stars
• named the constellations : greeks, babylonials, and egyptians
• Hercules and Orion - Navigational for travelers
• Astronomy - science of the universe ; heavenly bodies
• Phases of the moon :

  1. New Moon
  2. Waxing Crescent
  3. First Quarter
  4. Waxing Gibbous
  5. Full Moon
  6. Waning Gibbous
  7. Third Quarter
  8. Waning Crescent
• Lunar Eclipse - moon passes through earth's shadow
• Lunar Eclipse - twice every one year ; lasts for a hour
• Solar Eclipse - sun's light is blacked by the moon
• Solar Eclipse - occurs every three years
• Solar Eclipse - lasts for few minutes]
• Umbra - darkest part of a shadow ; completely blocked
• Antumbra - lighter shadow surrounded by a darker region
• Penumbra - partially shaded area
• Celestial Sphere - where stars are attached to
• Polaris - North STar
• Diurnal Motion - apparent daily revolution
• Diurnal Circle - complete diurnal motion
• the motion of diurnal motion is east to west
• Circumpolar stars - never seem to go away from the horizon
• Annual Motion - apparent yearly movement
• Annual motion - sun revolves 360 ydegrees a year
• Precision of the equinox - sun revolves around the eplictic
• Vernal Equinox - spring, March 20th
• Precision of the equinox - intersects the celestial equator twice during a year at two points
• Autumnal Equinox - September 22nd
• Cyclic Precession - wobbling of earth's axis
• Mercury - smallest and fastest
• Mercury - closest to the sun
• Mercury takes 8 earth days to make one revolution
• Venus - brighter than mercury
• Evening Star - march and april
• Morning Star - september and october
• The only planet that rotates clockwise is Venus
• Mars - suitable for life
• Mars - has polar ice caps that grow
• 2 moons of mars - phobos and deimos
• Jupiter - biggest planet, surface cannot be seen
• Saturn - famous rings, 23 moons
• Greece- where golden age of astronomy was centered
• geocentric view - earth was the center of the universe