Question

1. what is the main cause of day and night on earth? a) the sun moving across the sky b) earth’s revolution around the sun c) earth’s rotation on its axis d) the tilt of earth’s axis

Explanation:

Day and night on Earth are caused by Earth's rotation on its axis. As Earth rotates, different parts of the planet face the Sun (day) or are in shadow (night). The Sun's apparent movement across the sky is due to Earth's rotation, not the Sun moving across the sky. Earth's revolution around the Sun causes the seasons, and the tilt of Earth's axis affects the intensity and distribution of sunlight but is not the main cause of day - night cycle.

Answer:

c) Earth's rotation on its axis