What effect does Earth's rotation have?

• A. Determines ocean currents
• B. Changes daily temperatures
• C. Affects tectonic movements
• D. Defines seasons

Answer: (B)

The correct choice highlights that Earth's rotation has a significant impact on daily temperatures, primarily through the cycle of day and night. As the Earth rotates on its axis, different regions are exposed to sunlight, causing temperatures to rise during the day. Conversely, when a region is in the shadow of the Earth, temperatures typically drop, creating cooler conditions at night. This daily cycle of light and darkness directly influences local temperatures, which fluctuate depending on exposure to the sun.

In contrast, while Earth's rotation does play a role in determining ocean currents and influencing seasons, these processes are more complex and involve additional factors such as the tilt of the Earth's axis and the force of gravity. Tectonic movements are primarily driven by forces within the Earth rather than by its rotation. Thus, the impact of Earth's rotation is most apparent in the context of daily temperature variations.