The time required by moonlight to reach the earth is about:
- (A) 1.0 sec
- (B) 1.3 sec
- (C) 1.7 sec
- (D) 1.9 sec
- (B) 1.3 sec
Phases of the Moon are caused by the rotation of:
- (A) Sun
- (B) Moon
- (C) Earth
- (D) Comet
- (C) Earth
Sun takes _______ years to travel around the galaxy.
- (A) 100 million
- (B) 200 million
- (C) 225 million
- (D) 300 million
- (C) 225 million
The orbit along which the earth revolves is:
- (A) Circular
- (B) Irregular
- (C) Spiral
- (D) Elliptical
- (D) Elliptical
The time taken the “Earth” to revolve round the sun is approximately:
- (A) 100 days
- (B) 225 days
- (C) 300 days
- (D) 365 days
- (D) 365 days
The darkest part of the shadow during eclipse is:
- (A) Halo
- (B) Umbra
- (C) Penumbra
- (D) Black hole
- (B) Umbra
Cycle of seasons is caused by due to:
- (A) Rotation
- (B) Revolution
- (C) Gravitation
- (D) Tilt of earth
- (B) Revolution
Of the total volume of the Earth, which layer forms the major part?
- (A) Core
- (B) Sima
- (C) Mantle
- (D) Sial
- (A) Core
How long does a sun-ray take to travel from the sun to the earth?
- (A) 499 seconds
- (B) 599 seconds
- (C) 699 seconds
- (D) 799 seconds
- (A) 499 seconds
Day and night are equal at the:
- (A) Poles
- (B) Meridian
- (C) Equator
- (D) Antarctic
- (C) Equator