The of the earth result because the plane in which

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The ______________ of the Earth result because the plane in which the Earth revolves does not coincide with the plane of the Earth's equator. Explanation: Seasons. The Earth's axis is tilted from the vertical by 23.5° as it makes its orbit around the sun. The result of this tilt (or obliquity of the ecliptic) is that the Northern Hemisphere is inclined toward the sun in June and away from it in December, thus varying temperatures in the seasons: The measurement of _________ is based on the rotation of the Earth. Explanation: Time. As the Earth turns, objects in the sky appear to move around us, crossing the meridian each day. Time is determined by the position in the sky, with respect to the local meridian, of some reference object on the celestial sphere. The interval between successive meridian crossings or transits of that object is defined as a day and each day is divided into 24 equal parts called hours. The __________ day is the period of the Earth's rotation with respect to the sun. Explanation: Solar. A solar day is one complete rotation of the Earth. There are about 365 days in a year (the time it takes to make one complete revolution around the sun) and 360° in a circle. Therefore, the daily motion of the Earth in its orbit is about one degree. With the development of railroads and the telegraph, it became necessary to establish time _________ for the standardization of time within the nation. Explanation: Zones. In 1883, the continental United States was divided into four time zones; Eastern Standard Time (EST), Central Standard Time (CST), Mountain Standard Time (MST), and Pacific Standard Time (PST). In 1884, an international conference was held in Washington, D.C. in which 26 nations were represented. At that conference it was agreed to establish a system of 24 international time zones around the world. To take advantage of the maximum amount of sunlight during waking hours, ___________ ____________ time was established during the spring and summer. Detailed Explanation: Daylight Saving. Daylight saving time is simply the local standard or zone time of the place plus one hour. Thus, on a summer evening, when it would ordinarily get dark at about 8:00 p.m. standard time, it does not get dark until 9:00 p.m. daylight saving time. The practice of having a daylight saving time is not universal--it varies from country to country. The natural units of the calendar are the ______, based on the period of rotation of the Earth. Day.
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The __________ is based on the period of revolution of the moon around the Earth. Explanation: Month. The _________ is based on the period of revolution of the Earth around the sun. Explanation: Year. The three units of calendar measure--day, month, year--do not divide evenly into any of the others. The period of revolution of the moon around the Earth is about 27 1/3 days. The period of revolution of the Earth around the sun is 365 days, 6 hours, 9 minutes, and 10 seconds. Those extra 6 hours in our orbit around the sun account for why we have a leap year every four years--to accommodate for the extra day that has accumulated.
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