Rotation and Revolution — Geography STD 9 — Question

(a) Due to the revolution, the length of days and nights varies at a place at different times of the year.
(b) Revolution causes a change of seasons.
(c) It helps in the location of Tropic of Cancer and Tropic of Capricorn due to the fact that Sun rays fall vertical here.
(d) The altitude of the mid-day Sun changes.
(e) It gives us a measure of time for one year.
(f) Poles have days and nights of 6 months duration.
(g) It determines the distribution of solar energy on Earth.