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Unformatted text preview: (about July 4; 94.5 million miles away) o average Earth-Sun distance is approximately 93 million miles away Earths seasons are related to the amount of solar energy received at the surface, which is determined by two variables: 1. the angle at which sunlight strikes Earths surface 2. the amount of time that the Sun is above the horizon-Radiation striking Earth perpendicularly is much more intense than radiation striking at an angle [but covers less area]-Incoming solar radiation, termed insolation , is absorbed, scattered, and reflected within Earths atmosphere-So, the higher the sun is in the sky and the longer it is above the horizon, the more energy Earth receives.- Earth is tilted 66.5 degrees from the plane of its orbit around the Sun ( plane of the ecliptic ) or 23.5 degrees from the perpendicular to the orbital plane...
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- Summer '08