Systerms : system terms : Earth's rotation and revolution

A (41) | B (23) | C (62) | D (45) | E (33) | F (34) | G (18) | H (16) | I (28) | J (2) | K (5) | L (14) | M (29) | N (17) | O (10) | P (62) | Q (10) | R (41) | S (74) | T (31) | U (12) | V (12) | W (8) | X (1) | Y (2) | Z (2)

The Earth does two kinds of movements every day: one is rotating around its axis, and the other is revolving around the Sun, both moving from west to east. Rotation gives us the alternation of day and night, while revolution brings about the changing seasons.

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