* Earth's Rotation: Our planet spins on its axis, completing a full rotation approximately every 24 hours. This spinning motion causes different parts of the Earth to face the sun at different times.
* Day and Night: As the Earth rotates, the side facing the sun experiences daylight, while the opposite side experiences night. This is why we have a cycle of day and night.
* Sunlight Angle: The angle at which sunlight hits the Earth also varies depending on the time of year and location. This is why we have seasons and why the length of day and night changes throughout the year.
Think of it like a giant spotlight: The sun is like a giant spotlight, and only the portion of Earth directly facing it is illuminated at any given moment.