The cycle that is a direct result of the Earth's rotation is the day-night cycle. As the Earth rotates on its axis, different parts of the planet are exposed to the Sun's light, causing the alternation between day and night. This rotation takes approximately 24 hours to complete, resulting in a 24-hour day where daytime and nighttime conditions change as the Earth spins. This cycle of rotation is fundamental to the concept of time measurement and has a significant impact on the Earth's climate, weather patterns, and the daily activities of living organisms on the planet.