What are 6 different proofs that the shape of the earth is a sphere?

Question

Please help me because i jjust have no idea???

Answer 1

(1)Out of all multidimensional geometric figures,sphere has the least surface area.Thus all particles try their best to attain a spherical shape in order to reduce their surface area.When the earth was formed,it passed through three states-gaseous,liquid and solid.When it was in the first two states, it attained the spherical structure(so that it can have least surface area) due to cohesive force(force of attraction between the molecules of the same element).
(2) The photographs taken from moon when man landed there first.
(3) If you are standing in a sea shore and looking at a ship which is going away from you,you can notice that the body of the ship vanishes but the mast is seen for sometimes.
(4) During solar eclipses, you can see the earth's shadow contains an arc shaped portion.
(5) In our solar system,all the planets(other than earth) have been viewed through telescope from the earth and have been found to be spherical.So, earth also should be spherical.
(6)You can go to India from USA,either flying towards west or towards east which is possible only when the earth is spherical.

Answer 2

1) Several space craft have flown around the world. The most recent would be the Space Shuttle and the International Space Station.

2) At least one airplane has flown around the world.
http://www.dickrutan.com/page2.html

3) At least on balloon has flown around the world.
http://www.socialstudiesforkids.com/articles/currentevents/balloonjourney.htm

4) Several ships have sailed around the world.

5) Photos of the earth from the moon.
http://cygnus.colorado.edu/apas1030images/Earth-Moon/earthrise.jpg
http://cache.eb.com/eb/image?id=65046&rendTypeId=4
http://epod.usra.edu/archive/images/main_earthrise.jpg

6) Several people have traveled around the earth.

Answer 3

such a smart answer ^o^