Orbital Motion and Seasons Study Guide

(a)   is always moving.

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The earth's rotation causes day and (a)   .

Every year, Earth makes one complete orbit around the (a)   .

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Its axis always tilts in the same direction, so the parts of the Earth that receive more direct (a)   sunlight and have more daylight hours change throughout the year.

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This causes (a)   -times of the year with particular patterns of weather and daylight, which vary depending on where you live.

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Most places experience four seasons: (a)   ,summer, fall, and winter.

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Every day, the sun appears to move across the sky from east to west because of earth's (a)   .

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When the Sun's position is higher in the sky at noon, there are more hours of daylight and sunlight strikes the surface at a more (a)   angle.

The higher the Sun appears in the sky, the more solar energy reaches the surface. In general, this makes it (a)   .

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When the sun appears lower at noon, there are fewer hours of daylight and, since sunlight strikes less directly,less (a)   reaches the surface.

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