Why our earth is round

Why our earth is round is an amazing question and everyone wants to find out the answer. Check out the below to get it

Take a walk outside to prove the point. Does it seem like you're walking on a giant, round ball? Do you feel yourself flying through the air around the Sun? No! Based upon your senses, would you guess that Earth is round? Does it seem like you're traveling around the Sun instead of the other way around? Wanna take a quick look at funny pictures with captions that can help you relax effectively.

Hundreds of years ago, people believed Earth was flat and that the Sun traveled around Earth. We now know different, but were those views really all that crazy back then? Probably not! The evolution of scientific knowledge has proven that, when it comes to astronomy, you can't always rely on your senses.

We already know that Earth is round. But why is it round? And is it perfectly round like a rubber ball? Let's see what science can tell us about the answers to those questions.

Two features of Earth that determine its shape are mass and gravity. These features are, in fact, interrelated. Mass attracts other mass, resulting in the force we call gravity. Smaller objects, such as a car or a house, have tiny gravitational forces. The amount of mass throughout Earth, however, is huge and really adds up, from amazingsciencefactsforkids

Scientists theorize that about 4.6 billion years ago, the solar system was a cloud of dust and gas. As gravity pulled the matter in on itself, it began to spin and clump up, forming the sun, planets, moons, and other space objects. Earth's rocky core was the first part of our planet to form, with dense matter sinking to the center and binding together. Then lighter pieces gathered and formed Earth's crust.

As Earth's mass added up from all this matter and gravitational forces increased, the matter attempted to take the most efficient shape possible: a sphere. If Earth was a cube, its corners would be farther away from its center than other points. Because gravityacts equally on everything, the corners would need to be pulled closer to the center. Check out my list of fun, weird and just plain amazing fact of life I have found.

The result of evening out the uneven places is that you end up with a shape in which every point on the surface is the same distance from the center. The only shape that fits that definition is the sphere. So, gravity is the answer to why Earth is round!

If you've seen pictures of asteroids that exist in outer space, you may have noticed that some of them are irregular, rocky shapes. That's because they're not big enough to pull themselves into a sphere. If they continue to grow and gain mass, eventually they, too, will form themselves into a sphere. Astronomers have made that ability — the ability to form into a sphere — as one of the requirements to be considered a planet!

If you've seen pictures of Earth from space, Earth does indeed look like a perfectly-round ball. Astronauts have even nicknamed it the “Blue Marble." Scientists will tell you, however, that Earth is not perfectly round. Its true shape is closer to that of an ellipsoid.

Earth's constant rotation creates centrifugal forces that make Earth wider at the equator than the poles. How much wider? About 70,000 feet wider! You've probably also noticed that Earth's surfaceisn't flat. High mountain ranges and deep ocean trenches also contribute to Earth's slightly-irregular shape.

Earth's shape is also not static. It's always changing. Sometimes these changes are regular, such as daily tides that affect the oceans and Earth's crust. Other changes are irregular and extremely slow, such as the movement of Earth's tectonic plates. Sometimes natural disasters can result in sudden changes, such as is the case with earthquakes, volcanic eruptions, and meteor strikes. That might be one of the most awesome interesting facts ever.

There's actually a field of science dedicated to measuring and monitoring Earth's size and shape. It's called geodesy, and scientists with the National Geodetic Survey keep an eye on Earth's ever-changing shape and size.

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Top funny facts about science and technology for kids

Top fun, amazing, interesting facts about technology and science for kids:

1.      220 million tons of old computers and other technological hardware are trashed in the United States each year.

2.      A diamond will not dissolve in acid. The only thing that can destroy it is intense heat.

3.      According to Moore's Law, microchips double in power every 18 to 24 months.

4.      Albert Einstein won the Nobel Prize for physics in 1921.

5.      Although the famous first flight at Kitty Hawk took place on December 17, 1903, the secretive Wright Brothers did not demonstrate the technology to the broader public until August 8, 1908.

6.      As of early 2009, there have been 113 space shuttle flights since the program began in 1981.

7.      Bill Clinton's inauguration in January 1997 was the first to be webcast.

8.      Chuck Yeager blasted through the sound barrier at Edwards Air Force Base in 1947.

9.      Einstein received the Nobel Prize for Physics in 1921 for his explanation of the photoelectric effect, the phenomenon by which electrons are knocked out of matter by electromagnetic radiation such as light.

10.   In 1901, the Spanish engineer Leonar do Torres-Quevedo was responsible for the earliest developments in the remote control with his Telekine that was able to do "mechanical movements at a distance."

11.   In their Miyagi, Japan laboratories, beginning in 1924, Professor Hidetsugu Yagi and his assistant, Shintaro Uda, designed and constructed a sensitive and highly-directional antenna using closely-coupled parasitic elements. The antenna, which is effective in the higher-frequency ranges, has been important for radar, television, and amateur radio.

12.   Marie Curie was the first person to win two Nobel Prizes for Science

13.   No one has received more U.S. patents than Thomas Edison – 1,093 to be exact.

14.   On 11 July 1962, France received the first transatlantic transmission of a TV signal from a twin station in Andover, Maine, USA via the TELSTAR satellite.

15.   On 9 June 1906 the Winnipeg Electric Railway Co. transmitted electric power from the Pinawa generating station on the Winnipeg River to the city of Winnipeg at 60,000 volts. It was the first year-round hydroelectric plant in Manitoba and one of the first to be developed in such a cold climate anywhere in the world.

16.   On December 12, 1901, a radio transmission of the Morse code letter 'S' was broadcast from Poldhu, Cornwall, England, using equipment built by John Ambrose Fleming.

17.   One third of the world population has never made a telephone call.

18.   Samuel Morse, the inventor of the Morse code, was a painter as well. One of his portraits is of the first governor of Arkansas and hangs in the governor’s mansion of that state.

19.   Telecommunications satellites, and other satellites that need to maintain their position above a specific place on the earth, must orbit at 35,786 kilometers and travel in the same direction as the earth's rotation.

20.   The circumference of the earth is about 25,000 miles. Its surface area is about 200,000,000 square miles and it weighs 6,588,000,000,000,000,000,000 tons.

21.   The Ericsson Company first produced cellular phones in 1979.

22.   The first computer mouse was introduced in 1968 by Douglas Engelbart at the Fall Joint Computer Expo in San Francisco.

23.   The first Japanese-language word processor was developed in Tokyo between 1971 and 1978.

24.   The first laser was made in California in 1960.

25.   The first two video games copyrighted in the U.S. were Asteroids and Lunar Lander in 1980.

26.   The Internet is the fastest-growing communications tool ever. It took radio broadcasters 38 years to reach an audience of 50 million, television 13 years, and the Internet just 4 years.

27.   There have been 113 space shuttle flights since the program began in 1981.

28.   Tim Berners-Lee coined the phrase “World Wide Web” in 1990.

29.   U.S. President Bill Clinton's inauguration in January 1997 was the first to be webcast.

30.   Valdemar Poulsen, a Danish engineer, invented an arc converter as a generator of continuous-wave radio signals in 1902.

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Myths and facts about Planet Earth

I saw this science facts writing by accident and just want to share with all of you about it. Enjoy myths and facts about Planet Earth that are bound to widen your knowledge.

Fact #1

The planet Earth weighs approximately 5,974,000,000,000,000,000,000,000 kilograms (nearly 6 septillion kg). That is roughly the same amount of weight of 55 quintillions of Blue Whales, the heaviest creature on Earth.

Fact #2

Actually, it doesn’t take the Earth 24 hours to complete a single rotation. In fact, it only takes it 23 hours, 56 minutes and 4 seconds. Astronomers call this a sidereal day.

Fact #3

A year on the Earth is not 365 days as widely thought. It is in fact, 365.2564 days. The extra 0.2564 days is added onto February every four years, every leap year. That’s where leap year comes from.

Fact #4

The Planet Earth consists of 3 different layers including the Crust, the Mantle, and the Core(Outer Core and Inner Core). And each layer is made up of different elements. This is one of the most amazing facts about Planet Earth ever. 

Fact #5

The massive amount of water covering the Earth makes the Earth become one of the brightest planets when looking from a distance. It’s because the way the water reflects the Sun rays.

Fact #6

70% of the Earth’s surface is covered with water so people call the Earth the Blue Planet.

Fact #7

And surprisingly, only 3% of the total 70% of water covering the Earth is fresh. The rest is salted. 

Fact #8

And of this 3%, more than 2% resides in ice sheets and glaciers and 1% is in lakes and rivers.

Fact #9

The Earth is also the only planet in our solar system that is not named after either a Greek or Roman Goddess. It is the truth, not jokes for fun.

Fact #10

The name Earth comes from a combination of Old English and Germanic and is derived from "eor(th)e" and "ertha" which mean "ground".

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Is light considered matter?

Those who love to find out science facts will not want to miss this writing about answering question: 

That's a really great question. In fact this question caused a great debate among physicists during the time of Isaac Newton. Newton thought that light was a stream of little particles and other physicists such as Christian Huygens thought that the universe was filled with tiny particles called aether particles and that light was just a wave moving through the aether.

To make a long story short, it turns out they're both kind of wrong... and they're both kind of right. In some situations light sort of acts like a stream of particles and in others it acts sort of like a wave. Today many physicists (myself included) like to say that light is neither a particle or a wave... it's just light.

So, some might say that because light can carry energy from the sun to the earth it must be matter. Others might say that because you can't hold a lump of light in your hand light isn't matter. It all depends on what you mean by the word 'matter.' But the important thing to remember is that light doesn't care what you call it, it will still act the same way no matter what. That's why in physics we try not to worry too much about what things are called and focus on understanding how things actually behave.

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How can rainbow form?

In order to answer the science facts question: How can rainbow form?, let's have a look the article as below:

One of nature's most splendid masterpieces is the rainbow. A rainbow is an excellent demonstration of the dispersion of light and one more piece of evidence that visible light is composed of a spectrum of wavelengths, each associated with a distinct color. To view a rainbow, your back must be to the sun as you look at an approximately 40 degree angle above the ground into a region of the atmosphere with suspended droplets of water or even a light mist. Each individual droplet of water acts as a tiny prism that both disperses the light and reflects it back to your eye. As you sight into the sky, wavelengths of light associated with a specific color arrive at your eye from the collection of droplets. The net effect of the vast array of droplets is that a circular arc of ROYGBIV is seen across the sky. But just exactly how do the droplets of water disperse and reflect the light? And why does the pattern always appear as ROYGBIV from top to bottom? These are the questions that we will seek to understand on this page of The Physics Classroom Tutorial. To understand these questions, we will need to draw upon our understanding of refraction, internal reflection and dispersion.

The birth of each rainbow begins with millions of tiny rain droplets. The rain droplets serve as a type of reflector of light. White light enters one individual rain droplet and exits as one specific color of the spectrum. Without millions of rain droplets, a rainbow would not occur. If you only had a few rain droplets you would only see a few colors. This is typically why rainbow appear after a rain storm.

Each rain droplet has a function in the formation of the rainbow. Sunlight enters the rain droplet at a specific angle and the rain droplet separates the white light into many different colors. 

This angle is a fixed measurement between your eye and the sun. What color is refracted depends upon the critical angle, which is the angle the sunlight strikes the back of the rain droplet. Red light bends the least, exiting the rain droplet at a 42 degree angle, while Violet light bends the most, exiting the rain droplet at a 40 degree angle. All of the other colors of the rainbow exit the rain droplets at some angle between 40 and 42 degrees, thus making up the colors of the rainbow ROYGBIV, this order never changes.

Each rain droplet reflects all colors at a given point and time, but only one color comes back to your eye, requiring million of rain droplets to create a rainbow. As the rain droplets fall through the sky, the colors of the spectrum being reflected and refracted are constantly changing.

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