Why world is round?

Answer 1

because gravity shaped it this way, everything being pulled towards the center created a spherical shape.

Answer 2

From: http://www.physlink.com/Education/askExperts/ae535.cfm

This is a question that has been asked for many years, and there are some very intuitive, and some not-so-intuitive answers.

To start with... there's a horizon, meaning that the surface that one is observing from is not an infinite plane. On the clearest of days, the only restriction to one's range of sight is the horizon. There can be two explanations for this - one, that the Earth at some point just stops, as if you were looking off the edge of a table. The other is that the Earth is round. Hundreds of years ago, before the invention of the compass or sextant, precise navigation for ships was difficult, even with the stars. Ships that ventured past sight of land were often lost, and thus it was generally believed that the world simply *stopped* at the end of the horizon. With the invention of the compass, and improved map-making, people began to dare more, and with the return of Columbus from his trans-Atlantic voyage, the concept of the Earth as flat was shattered.

Further proof of the Earth being round came after the voyage of Columbus. When Newton discovered and measured the force of gravity, that number could then be tested anywhere the theory was known. Since the force of gravity is roughly the same everywhere on the globe, it could be surmised that the Earth must be spherical. If the Earth were not round, whole hemispheres would have different atmospheric pressure and significantly different sea levels. Also, pictures taken of the Earth in the last 50 years have proved absolutely conclusively that the Earth is round. These are just the arguments that don't require much physics knowledge to explain, there are others that are more technical, but I think that the simplest arguments are the best.

Answer 3

Why are most planets round? Here's a good answer..

"Rocky planets like Earth are thought to form when dust motes around a nascent star gather to form rocks. Rocks collide, and some stick and grow.

"The dust bunnies under your bed grow in a similar way," said Scott Kenyon, a planet-formation theorist at the Harvard-Smithsonian Center for Astrophysics. "And after a million years, a dust bunny can get pretty big.""

Hard to believe we can be compared to dust bunnies!

Think about what would happen if you dropped a small magnet into a pool filled with iron filings. The iron filings would be attracted to the magnet and stick all over it in an even layer. That's kind of how particles in space behave

As these particles get bigger and bigger, they can eventually turn into planets, given all the right conditions.

Answer 4

A sphere is the shape that has the smallest surface area compared to its volume. It requires the least amount of effort (or energy) to form. Nature often does things the easy way or by seeking the lowest energy level. Similarly, a raindrop is round shaped (not teardrop shaped) and when you blow a bubble it forms a sphere for the same reason.

Answer 5

FIrst thing of...

when u mean world =earth

then my answer would be that World is not ROUND.. ITs Oblate Spheroid.. this has been the misconception over the past centuries up until now.. so always remember ....

XD

Answer 6

It is actually in the shape of an ellipse.

Minor axis is along the north/south poles.

The reason is that the earth is rotating along the north/south axis. Imagine a tire on a vehicle. If the x-axis is the axle, as the tire spins the tire in the y-direction gets taller.

Answer 7

Round things spin better; least resistance.... or is it fast spinning objects always end up round if you wait long enough? Either way.......

Answer 8

if it was a cube then the corners of the cube would weigh so much that they would collapse so if you started out with a cube you would end up with a sphere. its all gravity.

Answer 9

gravity. and circles/spheres are the strongest shapes in the universe

Answer 10

He has made night and day subservient to you, and the sun and moon and stars, all subject to His command. There is certainly Signs in that for people who pay heed. (Surat an-Nahl: 12)