earth is flat or sphere? explain clearly.
Answers
Is earth a sphere?
The Earth is actually an ellipsoid technically known as an oblate spheroid as the Earth is slightly flattened at the poles and bulges out at the equator due to the rotation of the Earth on it's axis. However a sphere could be considered a reasonable representation of the shape of the Earth!
The technical term for the shape of the Earth is "geoid" and an idealised shape based on the "geoid" is known as the reference elipsoid. The study of the Earth's true shape is known as "Geodesy" or "Geodetics".
For more information on these admittedly complex topics please see the related links
please mark me as brain list
Humans have known that Earth is round for more than 2,000 years! The ancient Greeks measured shadows during summer solstice and also calculated Earth's circumference. They used positions of stars and constellations to estimate distances on Earth. They could even see the planet's round shadow on the moon during a lunar eclipse. (We still can see this during lunar eclipses.)
Today, scientists use geodesy, which is the science of measuring Earth's shape, gravity and rotation. Geodesy provides accurate measurements that show Earth is round. With GPS and other satellites, scientists can measure Earth's size and shape to within a centimeter. Pictures from space also show Earth is round like the moon.
Even though our planet is a sphere, it is not a perfect sphere. Because of the force caused when Earth rotates, the North and South Poles are slightly flat. Earth's rotation, wobbly motion and other forces are making the planet change shape very slowly, but it is still round.