Movement of the Earth and Moon Flashcards
(22 cards)
Greek philosophers who believed in the spherical model of earth
Pythagoras and Aristotle
What is the shape of the earth?
Oblate Spheroid
How long is the complete revolution of earth?
365.26 days
0 degree longitude
prime meridian
180 degree longitude passing over Pacific Ocean
International dateline
one lunar revolution is equal to?
28 days
The eclipse is a type of syzygy. What is a syzygy?
A straight line configuration of at least three celestial bodies
Total, Annular, or Partial solar eclipse: the sun appears as a bright ring and the moon is smaller
annular
Total, Annular, or Partial solar eclipse: the moon only partially covers the sun
partial
What happens to the moon when there is a lunar eclipse?
Becomes reddish and only little light is reflected on it
Constant rise and fall of waters due to interplay of gravitational forces of earth, moon, and sun
tides
Spring or Neap tides: sun is in line; moon is in full or new
Spring tides (full)
Spring or Neap tides: sun is at right angles; moon is in first or last quarters
Neap tides (low)
Who created the geocentric model?
Ptolemy
Who created the heliocentric model?
Nicolaus Copernicus
Three laws of planetary motion
1) Orbit is an ellipse with the sun in one of the two foci
2) A planet moves faster when closer to the sun
3) Period of revolution is directly proportional to the cube of the distance of the sun
Aphelion or Perihelion: nearest point to the sun
Perihelion
Apogee or Perigee: farthest point of the sun
Apogee
The force that makes a body follow a curved path
Centripetal Force
Force that goes against centripetal force
Centrifugal Force and inertia
States that gravitational force between two objects is proportional to their masses and inversely proportional to the square of the distance from each other’s centers
Newton’s Law of Gravitation
Universal Gravitational Constant is?
6.670 x 10^ -11 Nm^2/kg
