Why has the world a shape of the ball?

Question

Why does't it have a flat shape instead?

Answer 1

Here is your answer:

Why is the Earth round (planets and the sun, too)?

It's the gravity, of course. Imagine Earth were liquid--consisting, say, only of water. Gravity would of course pull that water towards the center, and if any could flow closer to the center, it would do so. Therefore, if such an Earth were not a sphere--if some points were higher than the average--their water would quickly flow down. Water would also flow into any valley deeper than the average and fill it up. The final shape MUST be a sphere. Only then does every point on the surface have the same distance from the center. Gas planets like Jupiter, Saturn, Uranus and Neptune behave the same way, since gas flows like a fluid. The Sun is gas, too, so it must be spherical. But Earth? The Moon? Why should a planet composed of solid rock have the same shape as one composed of water?

Because, dear friend, once you descend a few hundred miles (or
kilometers), rocks flow like a fluid, too. A rock 300 miles underground bears the weight of a 300-mile layer of rock, and under such pressure even solid material will gradually yield, more so because of the intense heat there. Hence the rocky Earth is close to a sphere.

Mountains may stick up 30000 feet, but not much more, otherwise the ground will slowly sink under their weight. Olympus Mons on Mars can reach 80000, but the weaker gravity of Mars makes it possible. Asteroids 100 miles across may still be potato-shaped (not enough gravity to give the outer layers enough weight), but by the time you reach 300 miles,
round is the rule.

Round ... but not always completely round. Earth bulges a little at
the equator, because rotation flings matter outwards, weakening gravity there by a fraction of 1%. Jupiter spins faster than Earth--just under 10 hours--and bulges much more: telescope pictures of Jupiter show it visibly fatter at the equator. And our Moon--why do you think it always presents the same face to the Earth? Yes, it is lightly longer in that direction, and the pull on the part sticking out towards Earth keeps it aligned that way.

Answer 2

Do you mean, "Why does planet earth resemble a ball instead of a Frisbee?". ( "A shape of the ball" ?????)

Geophysics determines the shape of the planet, it is an elliptical object not a sphere. Mass determines the fact that it resembles a spheroid, just remember you are further from the centre of the planet at the equator than you are at the poles. A little thought will tell you why, think in terms of spinning masses and the acceleration and accumulation of matter. (Sounds a bit complicated, but it really is simple, the language we use makes it sound confusing.)

Answer 3

Becuse the creator,God decided to make it round. Besides a flat object doesn't rotate very well-the earth,the sun,the moon,the planets all are of a round shape-for they rotate-turn and much easier by a ball shape.

Answer 4

Because gravity compresses on all sides equally.Some of our planets moons are very small and dont have enough gravity to compress them into a sphere.They look like giant potatoes floating around their respective planet.So goes for asteroids.Take a look sometime at a picture of Eros.

Answer 5

because the sphere is the body shape of less surface, its the same as a water drop. and once in a while the earth was melted, by gravity, it adopted the shape of less surface.

Answer 6

Earth started out mostly as a ball of liquid that eventually cooled into what we know it as now. Liquids exist in space as spheres because of equal pressure (none) on all sides.

Answer 7

Because the universe had created from a explosion of energy with infinity of density.(called big bang). thereby, it has begun to expanding after that explosion. and that expansion exerted same energy in all the universe, so it is expand in spherical shape.

Answer 8

the world is geoid in shape
its got the shape due to the fast revolution n rotation on its axis

Answer 9

Who said that the Earth is round? Read below.

Answer 10

the earth is actually an ellipse, and if it was flat, you wouldn't be around to ask the question!