Coriolis effect: Earth's rotation deflects moving objects or currents in a circular motion called the Coriolis effect. Deflected to the right in the northern hemisphere and left in the southern hemisphere, the Coriolis effect impacts large-scale weather patterns and ocean currents.

Day and Night Cycle: Earth's rotation on its axis causes different parts of the planet to face the Sun, creating the cycle of day and night. As Earth rotates, the side facing the Sun experiences daylight while the opposite side plunges into darkness.

Flattening at the Poles: Because Earth rotates, it bulges slightly at the equator and flattens at the poles. This flattening is due to centrifugal force generated by the rotation, causing Earth to have an oblate spheroid shape.

Tidal Effects: Earth's rotation, along with the gravitational influence of the Sun and the Moon, creates tides. The rise and fall of ocean levels occur as the Earth rotates and different regions move through alignment with these celestial bodies.

Geoid Formation: Earth's rotation generates variations in gravitational forces across the planet. These variations lead to slight variations in sea level, forming a geoid—the shape of Earth's surface considering gravity.

Precession of the Equinoxes: Earth's axis of rotation wobbles like a spinning top over a period of about 26,000 years. This slow shift in the axis direction affects the alignment of the equinoxes and solstices, causing these events to occur on different dates over long time spans.

Variation in Gravity: Earth's rotation influences the distribution of mass within the planet. The resulting variations in gravity give rise to the concept of geoid heights and impact the accuracy of sea-level measurements and global positioning systems.