(ALL) PHYSICAL SCIENCE (1ST)

• oblate spheroid


  shape of the earth, it has bulging and squized poles
• solstice


  either of the two times in the year, the summer solstice and the winter solstice
• summer solstice


  happens every June, the longest day and NORTH pole is attracted
• winter solstice


  happens every December, the shortest day, SOUTH pole is attracted
• eclipse

  scurring of light from one celestial body by the passage of another between it and the observer or between it and it's source of illuminati nation
• heliocentrism


  the sun is the center of the solar system
• geocentrism


  the earth is the center of the solar system
• Anaxagoras


  able to explain what causes the phase of the moon. according to him, the moon shone only by reflected sunlight.
• eudoxus


  proposed a system of fixed spheres. believes that the sun, the moon, the five known planets and the stars were attached to these spheres.
• Aristotle


  a student of Plato. the earth is spherical shape since it always cast a curve shadow when it eclipses the moon. he also believe that the earth is the center of the universe
• aristarchus


  first Greek to profess the heliocentric view. he learned that the sun was many further time than the moon and that it was much larger than the sun. he also made attempt to calculate the distance of the sun
• Eratosthenes


  first successful attempt to determine the size of the earth was made by him. he also computed approximately 250000 stadia and about 40000km
• hepparchus


  considered as the greatest of the early Greek astronomers. compared the brightness of the 850 stars and arranged them into order as brightness or magnitude.
• Claudius Ptolemy


  believed that the earth was the center of the universe
• ptolemic model


  claimed that planets moved in a complicated circular orbit around the earth by the sun and the moon
• moon


  a natural object that orbits the larger object
• solar eclipse


  type of eclipse that occurs when moon passes between the sun and the earth. the moon completely blocks the light from the sun
• lunar eclipse


  one of the cyclically recurring apparent forms of the moon
• gibbous


  🌖 🌔 figure of the moon that is more than half tull. looking swollen on one side
• crescent


  🌘🌙 figure of the moon that is appear as a curve with pointy ends
• waxing


  🌒🌔 also known as GROWING, describes the moon when the illuminated portion is INCREASING
• waning


  🌖🌘 also known as SHRINKING, describes the moon when the illuminated portion is DECREASING
• planet


  large round object that orbits the sun and has cleared out most of the other object in it's orbits
• solar system


  the sun and all of the planets comets, etc. that revolves around it.
• gnomon


  the projecting sundial that shows the time by the position of it's shadow.
• 340000km


  distance of the moon from the earth
• what are the phases of the moon
• diurnal motion


  refers to the apparent movement of the stars and other celestial bodies around the earth. it is the circular path that the celestial bodies take to complete the ___________
• annual motion


  yearly, the movement of the stars as observed from the earth as a direct effect on the earth revolutionary around the sun.
• 360


  sun revolves _______ degrees a year.
• ecliptic


  sun moves eastward. sun rises north of east in the summer and south east of the winter. different consultation appear on the horizon through our the year as the sun revolves around the ecliptic
• precession of the equinoxes


  sun revolves around the ecliptic, it intersect the celestial equator twice during a year at two points
• vernal and autumnal


  these are two points are called EQUINOXES namely ________ and ________