Q.41)-We always see the same surface of the Moon because-
  • It is smaller than the Earth
  • It rotates on its axis
  • It takes the same time to rotate on its axis and moving around the Earth
  • It moves with the same speed at which Earth moves around the Sun
Q.42)-The darkest part of the shadow during eclipse is-
  • Halo
  • Umbra
  • Penumbra
  • Black Hole
Q.43)-Low tides are-
  • Strong
  • Weak
  • Moderate
  • Very Weak
Q.44)-Which of the following is caused by the combined effects of the gravitational forces exerted by the Moon and the Sun on sea levels?
  • Currents
  • Runoff
  • Tides
  • Waves
Q.45)-Tides are caused by the gravitational forces of-
  • Of Earth on Moon
  • Of Earth on Sun
  • Of Sun and Moon on Earth
  • Of Moon on Earth
Q.46)-When does tides rise in sea?
  • Only on lunar day
  • Full Moon and half Moon
  • When Moon is on first phase
  • Only half Moon
Q.47)-Which of the following celestial body contains Helium-4 in abundance?
  • Earth
  • Moon
  • Venus
  • Saturn
Q.48)-The Earth is tilted on its axis-
  • 23.5 degree
  • 22.5 degree
  • 21.5 degree
  • 20 degree
Q.49)-In how much time, Earth rotates once on its axis?
  • 23 hours 30 minutes
  • 23 hours 56 minute 4.9 sec
  • 23 hours 10 minute 2 sec
  • 24 hours
Q.50)-Day and Night are formed-
  • Due to the shape of the orbit of Earth
  • Due to the motion of revolution
  • Due to the speed of rotation
  • None of these