The sun provides warmth during the day, while the temperature drops during the night when the sun is gone.
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During the day, sunlight warms the Earth's surface, causing temperatures to rise. At night, without sunlight, the Earth's surface cools down as it radiates heat into the atmosphere. This difference in heating and cooling processes leads to temperature variations between day and night.
On a clear night, temperatures tend to drop more rapidly as heat escapes into the atmosphere. Cloudy nights act as a blanket, trapping some heat and causing temperatures to not drop as much as on clear nights. This can result in warmer temperatures on cloudy nights compared to clear nights.
Mercury has a huge temperature difference between its day and night sides. During the day, temperatures can reach up to 800 degrees Fahrenheit (430 degrees Celsius), while at night, temperatures can drop to around -290 degrees Fahrenheit (-180 degrees Celsius) due to its lack of atmosphere to retain heat.
Mountain breezes typically form during the night. As the sun sets, the air in the valley cools more quickly than the air on the mountain, creating a temperature difference. This temperature difference causes the air to flow from the mountain down into the valley, creating a mountain breeze.
Day and night occur due to the rotation of the Earth on its axis. During the day, the side of the Earth facing the Sun experiences daylight, while the opposite side is in darkness. As the Earth rotates, different parts of the planet transition between day and night.