* Rotation: The Earth spins on its axis, an imaginary line passing through the North and South poles. This rotation takes approximately 24 hours to complete.
* Sunlight: The Sun is the source of light. As the Earth rotates, different parts of the planet face the Sun.
* Daytime: When a part of the Earth faces the Sun, it experiences daylight. The sun's rays are directly hitting that area.
* Nighttime: When a part of the Earth is turned away from the Sun, it experiences nighttime. That area is not receiving sunlight.
Think of it like a spinning ball:
* Imagine a ball spinning on its axis. Only one side of the ball faces the light source at any given moment. As the ball spins, the side facing the light changes, causing different parts to experience "day" and "night".
Important Note: While the Earth rotates, the Earth's axis is tilted at an angle of 23.5 degrees. This tilt causes the length of days and nights to vary throughout the year, and is responsible for the seasons.
