OUR UNIVERSE

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1)   What is Solar Eclipse ?

  • [A] When the earth comes between moon and sun
  • [B] When the moon comes between the sun and the earth
  • [C] When the sun comes between moon and earth
  • [D] Caused by the gravitational forces of the sun or moon

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When the earth comes between moon and sun

2)   What is a tide?

  • [A] Waves created by the gravitational forces of the sun or moon
  • [B] Complete or Partial Obscuration of the moon surface
  • [C] Sun is never directly overhead and the temperature varies from hot to cool
  • [D] Waves created that are caused because of the Displacement of large bodies of water, but due to seismic disturbances

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Waves created by the gravitational forces of the sun or moon
TIDES AND THEIR CAUSES -----
 
Rise and fall of sea water is called TIDE.
 
Tides caused by the these two forces. 
 
1) Moon's Attraction. 
 
2) Centrifugal Forces.
 
TSUNAMI  ---
 
Waves that are caused because of the displacement of large bodies of water but due to seismic disturbances.(Ocean floor may be displaced by an earthquake; landslides , volcanic eruptions; a crashing asteroid; or underwater explosions, by which the water column is uplifted).

3)   Total number of latitudes including the equator are

  • [A] 180
  • [B] 178
  • [C] 179
  • [D] 181

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181

4)   Why we see only one side of the moon ?

  • [A] It has a Low Albedo
  • [B] It Rotates on its axis in exactly the same time of its revolution.
  • [C] The bright parts are the Mountains and Highlands while the darker patches are Low Lying Planes
  • [D] of the Gravitational Pull

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It Rotates on its axis in exactly the same time of its revolution.

5)   Which planet or planets rotates clockwise?

  • [A] Uranus
  • [B] Jupiter
  • [C] Venus
  • [D] Both a and c

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Both a and c

6)   Greatest ocean depth on earth is in

  • [A] Mariana Trench
  • [B] Dead Sea
  • [C] Mount Everest
  • [D] Belize Great Blue Hole

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Mariana Trench

Greatest Ocean Depth --- Mariana Trench (11,033m) located in the western pacific ocean.

7)   What is apogee ?

  • [A] Maximum distance from Sun
  • [B] Minimum Distance from Sun
  • [C] Maximum distance of the Moon from Earth
  • [D] Minimum distance of the Moon from Earth

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Maximum distance from Sun
Maximum distance of the Moon from Earth  ---- Apogee (4,06,000km from Earth)
 
Minimum distance of the Moon from Earth ---- Perigee  (3,64,000km from Earth)
 
Maximum distance from Sun (Aphelion) -- About 152 million km
 
Minimum Distance from Sun (Perihelion) ---- About 147 million Km

8)   Which planet is called the sideways planet ?

  • [A] Jupiter
  • [B] Earth
  • [C] Venus
  • [D] Uranus

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Uranus

9)   Which planet is called sister of earth ?

  • [A] Mars
  • [B] Mercury
  • [C] Venus
  • [D] Pluto

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Venus

10)   What causes the seasons ?

  • [A] Rotation of earth
  • [B] Revolution of earth
  • [C] Directions of winds and current are changed
  • [D] None of these

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Revolution of earth
REVOLUTION ----- (means Annual movement or Rotates around the sun)
 
Revolves around the Sun. Earth takes 365 days, 5 hours , 48 min and 45.51 sec (365 1/4 days) to complete 1 revolution. This 1/4 = 6 hours. This is the reason why every 4th year is a leap year. 6hours *4 = 24 hours = 1 day
 
It Causes seasons.
 
Days and nights are of unequal length at the same places.
 

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