FACTS ABOUT EARTH

·   Largest element found in earth crust is Silicon, second is Aluminum

·   Polar diameter of earth is 7900 miles

·   Equatorial diameter is 7927 miles = 12,756 km

·   Earth’s polar diameter is shorter than the equatorial diameter by 43 km

·   Distance of equator from either of poles is 10,002 km

·   World is divided into 24 time zones

·   Age of earth is 5 billion years

·   Speed of earth in orbit around sun is 8.5 miles/sec = 1600 km/min = 29 km/sec

·   Weight of earth is 6586 x 10 raise to 18 tons

·   Earth has 46.6% oxygen and 27.7% silicon

·   On 21^st June, sun is vertically overhead the Tropic of Cancer

·   The South Temperate zone lies between Capricorn and Antarctic circle

·   At equator the duration of the day is 12 hours

·   510 million square kilometers is the total surface area of the earth

·   Sun is 400 times larger than the Moon.

·   About 6 billion people living on the Earth.

·   When are you most likely to see a penumbra: During an Eclipse

·   At equator an object weights the least.

·   A wind, which reverses seasonally, is Monsoon.

·   Water is the most powerful source of erosion

·   Tropic of cancer crosses Pakistan.

·   Spring tides occur at new moon or at full moon.

·   Neap tides occur at first and third quarters of the moon.

·   Oceans are on average 4 km deep.

·   Frozen water covers about 10% of the earth

·   Solar eclipse occurs on new moon.

·   Lunar eclipse occurs on full moon.

·   The standard time of England is known as Greenwich Mean Time. T is local time of Greenwich Observatory which on 0° longitude.

·   Daylight saving time begun during WWI.

·   There are three belts of calm viz: Doldrums, Tropic of Cancer & Tropic of Capricorn.

·   Horn of Africa is Ethiopia, Djibouti and Somalia.

·   Kimberley is associated with Diamonds.

·   In Titusfills in Pennsylvania (US) is world’s first oil well drilled.

·   Thickness of earth crustes 20 miles.

·   Max height of cloud 20,000.