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Question

Which of the following statement(s) validate the theory that the Earth is spherical in shape?
  1. One needs to climb a tree or to a higher altitude to get a wide view of a field.
  2. A ship appears smaller and smaller until it gets out of sight while sailing towards the horizon.
  3. The hull of a ship disappears first followed by the mast while sailing towards the horizon.
  4. Different constellations are visible at different parts of the world.


Solution

The correct options are
A One needs to climb a tree or to a higher altitude to get a wide view of a field.
C The hull of a ship disappears first followed by the mast while sailing towards the horizon.
D Different constellations are visible at different parts of the world.
The theory that the Earth is a sphere can be validated by many examples from day to day life. For instance, the curved shadow of the Earth on the Moon during the Lunar eclipse. The rotation of the Earth and the Earth being a sphere implies that different parts of Earth enter and exit daylight at different times. Thus, there arises the need for different timezones. If the Earth would have been flat, a ship would appear to get smaller and smaller while sailing away from the shore and finally get out of sight. Also, different constellations are seen at different times of the year due to the Earth being a sphere and the rotation of the Earth around its axis.

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