Earth; the third planet from the Sun and the only known astronomical object capable of harboring and supporting life, is really wonderful. Land, which includes continents and islands, accounts for approximately 29.2 percent of the Earth’s surface. The remaining 70.8 percent is covered by water, mostly in the form of oceans, seas, gulfs, and other salt-water bodies, but also in the form of lakes, rivers, and other freshwater bodies, which comprise the hydrosphere. The polar regions of the Earth are mostly covered in ice. The Earth’s outer layer is divided into several rigid tectonic plates that migrate across the surface over many millions of years, while its interior remains active, with a solid iron inner core, a liquid outer core that generates Earth’s magnetic field, and a liquid inner core that generates Earth’s magnetic field. Have you ever thought about the shape of earth that is earth spherical or flat! In this article you will come to know about it!
The majority of the atmosphere on Earth is made up of nitrogen and oxygen. Tropical regions receive more solar energy than Polar Regions, which is then redistributed by atmospheric and ocean circulation. Greenhouse gases are also important in regulating surface temperature. The climate of a region is determined not only by latitude, but also by elevation and proximity to moderating oceans, among other factors. Severe weather, such as tropical cyclones, thunderstorms, and heatwaves, occurs in almost every area and has a significant impact on life.
The gravity of Earth interacts with other objects in space, particularly the Moon, which is the only natural satellite of Earth. The Earth orbits the Sun in about 365.25 days that is one year. Seasons occur on Earth because the Earth’s axis of rotation is tilted with respect to its orbital plane. The gravitational interaction between Earth and the Moon causes tides, stabilizes the orientation of the Earth on its axis, and gradually slows its rotation. Earth is the most massive and densest planet in the Solar System, as well as the largest and densest of the four rocky planets.
Is earth spherical or flat?
When viewed from space, the Earth appears to be round, but it is actually more ellipsoid in shape. Even an ellipsoid, however, does not adequately describe the shape of earth. By about 70,000 feet, our planet is rounder at the equator than at the poles. This is because of the centrifugal force produced by the earth’s constant rotation. Mountains nearly 30,000 feet high and ocean trenches 36,000 feet deep distort the shape of earth, even more. Even the sea level is irregularly shaped. Slight variations in the Earth’s gravitational field cause permanent hills and valleys of over 300 feet in the ocean’s surface relative to an ellipsoid.
Furthermore, the shape of earth is constantly changing. The shape of the planet changes in violent, episodic ways during events such as earthquakes, volcanic eruptions, or meteor strikes; sometimes the change is slow and steady, as with the drift of tectonic plates or the rebound of the crust after a heavy sheet of ice has melted.
Is earth expanding?
When Europeans first saw their first world map that included the Americas five centuries ago, they noticed something strange: the coastlines of Africa and South America would fit together like a Jigsaw puzzle if they weren’t separated by the Atlantic Ocean. This resemblance baffled thinkers of the time. This curiosity would lead to one of geology’s most dubious theories: the Expanding Earth theory.
According to the expanding Earth theory, our planet was only about 60% of its current size millions of years ago, and land covered the entire surface of this pint-sized globe. There were no oceans to speak of. The continental shell then shattered as the dwarf Earth expanded. Seas formed in the rifts between continents. Following a golden age of marine science in the twentieth century, scientists now understand how shifting plates have shifted continents over the course of Earth’s history. However, prior to the widespread acceptance of plate tectonics, the Expanding Earth theory was a popular explanation for the processes that shaped the Earth.
Is earth static?
No, earth is not static. Earth is continuously revolving around the sun, which causes years. As earth completes its one round outside the sun in 365 days, 5 hours, 59 minutes and 16 seconds, that is named as one year. Earth is not only executing the orbital motion, but it is also spinning around its own axis, which causes day and night on earth.
What if the Earth stopped spinning?
If the Earth suddenly stopped spinning, the consequences would be disastrous for much of the planet’s surface. We are all moving with the planet as it rotates, even if we don’t realize it; at the equator, this works out to around 1,000 miles per hour. Stopping the planet abruptly would cause everything on top of it to fly eastward. Imagine people, houses, trees, boulders, and other objects being thrown sideways at hundreds of miles per hour. High-speed winds, still rotating nearly as fast as the planet, would scour the surface clean in the aftermath.
If the slowdown occurred gradually, the effects would still be dramatic, but they would be spread out over a longer period of time. The first thing we may notice is that the Sun no longer travels across the sky in a 24-hour period. The apparent motion of the Sun is caused by Earth’s rotation, so if the planet were stationary, a single day would last half a year (though we could look forward to some very long-lasting sunsets).
In the next billion years, the likelihood of such an event is practically nil. If the Earth suddenly stopped spinning, the atmosphere would continue to move at the equator’s original rotation speed of 1100 miles per hour. Everything not attached to bedrock would be scoured from all of the land masses. This includes rocks, topsoil, trees, buildings, and even your pet dog!
Temperature of earth
The only planet we know of that can support life is Earth. The planet is neither too close to nor too far from the sun. It is located in a Goldilocks zone, which means that it is neither too hot nor too cold. One of the most important factors in making Earth habitable is the distance between Earth and the sun. Venus, the next closest planet to the sun, is the hottest planet in the solar system. Temperatures on Mars can reach more than 750 degrees Fahrenheit (400 degrees Celsius), while the average temperature on Mars is minus 80 degrees Fahrenheit (minus 60 C).
The Earth’s atmosphere also plays an important role in temperature regulation, providing a blanket of gases that not only protects us from excessive heat and harmful solar radiation, but also traps heat rising from the Earth’s interior, keeping us warm. According to National Oceanic and Atmospheric Administration, an average temperature of Earth is 14.4 °C for 2011.