WHY TIME VARY FROM ONE COUNTRY TO ANOTHER?

Earth moves west to east

All parallel circles from the equator up to pole are called latitude

90^o north latitude called North Pole

90^o south latitude called South Pole

Four important parallel latitude

The mid of cricket ball is looks like the equator of earth 

     Topic of cancer 23 ½  ⁰ north

   Tropic of Capricorn 23 ½  ⁰ south 

     Arctic circle 66 ½^o   north

     Antarctic circle 66 ½ ^o south

The mid day sum is exactly overhead at least once a year on all latitude in between topic of cancer and tropic of Capricorn this area receives maximum amount of heat so, it is called torrid zone

Area bound by the tropic of cancer and arctic  circle in northern hemisphere and area bound by tropic of Capricorn and Antarctic circle is called temperature zone.

Area lying between the Arctic Circle and the North Pole in northern hemisphere and Antarctic Circle and south hemisphere are very cold and south hemisphere is very cold so it called frigid zone

why time vary form one place of another ? 

Earth revolve 360^o in 24 hours

When we cover 1⁰  longitude it became 4 minutes more

Time of country depends on longitude.

When earth revolves 15^o it covers one hour.

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