What causes day and night?
chemical messengers The moon The ocean's waves chemical reaction Revolution around the sun The clock on the wall Evaporation of water Basic units of the plant body.
A B C D E F G H
The gravitational pull of the major planets alters the orbital period from revolution to revolution.
Gravitational pull causes alternative day cycles
What causes day and night? (A) chemical messengers (B) The moon (C) The ocean's waves (D) chemical reaction (E) Revolution around the sun (F) The clock on the wall (G) Evaporation of water (H) Basic units of the plant body.