Motions of the Earth Flashcards
It takes the sun 24 hour to complete the cycle, from noon to noon the next day.
Mean solar day
this movement of the sun is said to be due to the motion of the Earth about its axis known as _________.
Rotation
A complete rotation of the Earth on its axis takes only 23 hours and 56 minutes, known as the ______________.
Sidereal day
This is four minutes before the sun reach its noon position. This
accounts for the other motion of the Earth which is __________.
Revolution
These two motions were introduced
in 1543 by ________________.
Nicolaus Copernicus
Nicolaus Copernicus, amidst the accepted concept then of an immobile Earth
a geocentric system
On average, the distance between the Earth and the sun is 150 million kilometers or _______________.
One Astronomical Unit (1AU)
(January 4), the Earth is closest to the sun at 147 million kilometers.
Perihilion
(July 4), the Earth is farthest to the sun at 152 million kilometers.
Aphelion
It shows the axis of rotation of the earth.
North star
The sun follows the path along certain
constellations
Zodiacs
When the day and the night
are of equal length
Equinoxes
When the day or night is longest,
Solstices
a Serbian geophysicist and astronomer
Milutin Milankovitch
three (3) additional motions of the Earth to explain the recurring climatic peaks.
Milankovitch Cycles
