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The Geography of Earth's Equator. Geodesy and the Size and Shape of the Planet Earth. Understanding the Earth's Two North Poles.
The Meridian line shows many similar features throughout. The exact position of the Equator is not fixed. The actual Equator plane is perpendicular to the axis of rotation of the Earth, drifting about 9 feet a year. This effect should be taken into account in detailed geophysical measurements.
There are also deviations in the Equator line since there are small deviations in the axis of rotation of the Earth. In two commonly used geodesic standards, Equator is modeled as a circle with an integer meter radius. In , the International Astronomical Union chose the radius of 6.
However, due to the impact of tides on the surface of the Earth, the actual length of the Equator is about 40, During the year, the northern and southern hemispheres alternate between the sun, depending on the position of the Earth orbit.
When a half-sphere is facing the sun, it takes much sunlight and lives in the summer. Meanwhile, the other half sphere lives in the winter by taking less sun. Although there are dramatic differences in rain and humidity around the Equator, there is little change in temperature throughout the year.
Summer, autumn, winter and spring conditions are generally not valid. Plains around the Equator usually have tropical rainforest climate and cause cold currents. The tropical monsoon climates, also known as an equatorial climate, dominate the Equator District.
The average annual temperatures in the equatorial plains are around 31 degrees in the afternoon and 23 degrees in the afternoon.
There are about rainy days a year and the annual solar hours are around 2, Despite year-round sea level temperatures, there are glaciers at some high altitudes like Mount Andes and Mount Kilimanjaro. While the Earth is a member of the Solar system, the Earth has the property of turning around its own axis and around the Sun. This led to the emergence of concepts such as night and day and seasons.
Especially when we look at the movements of Earth around the Sun, certain dates are very important. Some of the most important of these dates are 21 March and 23 September.
However, elevation is measured from sea level, not the center of the Earth. Mount Everest is 8, meters 29, feet above sea level, while Mount Chimborazo is just 6, meters 20, feet above sea level. Crossing the Line Sailors have elaborate rituals and celebrations when they cross the Equator, which they call crossing the line.
Sailors who have never crossed the line are called pollywogs. Pollywogs are usually the target of embarrassing practical jokes. Short Sunsets The time it takes for the sun to set and rise at the Equator is the fastest on Earth. The transition from day to night takes only a few minutes. Regions are the basic units of geography. Sea level is determined by measurements taken over a year cycle. The audio, illustrations, photos, and videos are credited beneath the media asset, except for promotional images, which generally link to another page that contains the media credit.
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If no button appears, you cannot download or save the media. Text on this page is printable and can be used according to our Terms of Service. Any interactives on this page can only be played while you are visiting our website. You cannot download interactives. Climate describes the average weather conditions of a particular place over a 30 year period.
All places on earth have their own climates. Different from weather events, which are short-term and temporary phenomenon, climates are usually steady and predictable, and shape how organisms and human civilizations evolve and adapt in any given region.
However, climates are not always permanent, and can change drastically due to human activity. Explore the world's climates and how they affect local regions and the planet with this curated collection of resources.
The northern hemisphere experiences summer during the months of June, July, and August because it is tilted toward the sun and receives the most direct sunlight. Inversely, summer for the southern hemisphere takes place during the months of December, January, and February because that is when it receives the most direct sunlight. Did you know that the earth is approximately 3.
Learn more about the relationship between the earth and the sun with these resources. Encyclopedic entry. A great circle is the largest possible circle that can be drawn around a sphere. All spheres have great circles. Join our community of educators and receive the latest information on National Geographic's resources for you and your students.
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