y is the earth round?
350216
The pull of gravity.  The- surface area of a 1 gram ball is smaller than that of a one gram cube made of the same material.
457528
It is not just round or oval. It is elliptical. One side is close to the sun and one side is closer to the Oort Cloud, or Kuiper Belt, or maybe the heliosphere, the end of the sun's influence to the galaxy.
1119993
This is simply a matter of perspective. From the South Pole, the earth's rotation is clockwise.
1094061
Earth is revolving in orbit, held in place by the Sun's gravitational pull
455077
The actual shape of the Earth today is an OBLATE SPHEROID. It's a kind of sphere but flatter on two opposite sides. These sides are found at the poles.\n\nThe reason why the world is shaped like so is because of the the Earth's rotation. This spinning occured from the time of the Earth's formation up to this day. Centrifugal force tends to throw more matter in its equator than its poles.
1175748
God made the earth and other planets round. I learn.
1141360
hunnnnnn and i  bet you think ..earth  is flat
821694
It's round because it has enough gravity to make it round, the force of gravity crushing away irregularities until a round shape is achieved. There's actually a limit in astronomy, anything with more mass then a certain amount will as a rule be round.\n\nAs for the holes, I assume you mean the craters. They are there because we're basically living in a shooting gallery of asteriods, comets, and meteors. On the moon there are no erosive forces so when one hits it the impact crater remains.
1003678
I think the world is round. Have you been outside of your room even? If the world was flat, you would be flooded, he he. Why are there mountains if the world is flat? Really you can't even answer my question? Try going to the library and actually do some research. Gotta go. Rock.
147652
It varies a bit since the earth isn't exactly round, but an average of 12755 km over the equator and about 12155 km over the poles is about right I think.
551432
It's just an assumption...\n\ncoz it looks like a sphere... like how the moon looks round...\n\nBut can u be sure!!!
1115991
The ancient greeks knew the earth was round.  They knew it because they watched ships sail off.  Someone with good eyes could see that the ship was going over the horizon, the bottom of the ship dissappeared first.  Also, they knew that an eclipse of the moon showed the shadow of the earth on the moon.  Erastothenes calculated the diameter of the earth in about 200 bc.  He was accurate to about 3%.
576059
The earth isn't round. It's a squashed sphere, due to it's rotation.\n\nI wish grass fell from the sky. I have to go find a guy who knows a guy to get my grass.
105036
Earth revolves around this shinning star called a sun and it takes about 365 to 366 days to make a round trip around the sun.\n\n60 minutes and not 100 minutes --> Ever looked at a globe and the time zones? \n\nweek consists of 7 days --> Again with the Earth revolving around the sun.
740477
The earth is round and its gravitational pull draws us to its center.  Upside-down is really just pointing away from the core...from anywhere.
469675
Planets came from clouds of spinning gases that later solidified.   So they are pretty round, but not exactly spherical.  The earth is around 8,000 miles in diameter.  Black holes are proven.  They were proven using gravity experiments on nearby bodies and light experiments from stars "behind" them when viewed from earth.
1072716
If you mean the line is level to the surface of the Earth all the way around, then no, it's approximately a big circle.