1. Earth's Spherical Shape:
* The Earth is a sphere, meaning its surface curves. This curvature causes the sun's rays to hit different parts of the Earth at varying angles.
* Rays hitting the Earth directly at the equator strike the surface at a nearly 90-degree angle. This means the energy is concentrated over a smaller area, resulting in warmer temperatures.
* Rays hitting the Earth at higher latitudes (closer to the poles) strike the surface at a more oblique (angled) angle. This spreads the same amount of energy over a larger area, resulting in cooler temperatures.
2. Earth's Tilt:
* The Earth is tilted on its axis at approximately 23.5 degrees. This tilt is responsible for the seasons.
* During the summer solstice, the hemisphere tilted towards the sun receives more direct sunlight and experiences longer days and warmer temperatures. The sun's rays strike this hemisphere at a more direct angle.
* During the winter solstice, the hemisphere tilted away from the sun receives less direct sunlight and experiences shorter days and colder temperatures. The sun's rays strike this hemisphere at a more oblique angle.
In summary:
* Earth's curvature leads to varying angles of sunlight depending on latitude.
* Earth's tilt causes seasonal changes in the angle of sunlight, resulting in different temperatures and day lengths.
These factors together explain why the sun's rays strike the Earth's surface at different angles, leading to variations in temperature and climate across the globe.
