The oldest source of energy is: Sun
Which of following is used to measure distance between planet and stars: Light year
The cause of soil pollution is: acid rain
At the time of Solar Eclipse, rate of photosynthesis will: Decrease
In Space, an exploration Spectroscope is used for the following: To study chemical composition of Stars
Which of the following is not a natural satellite: Sputnik-1
The sun is containing _____ % mass of the solar system: 99.86%
The time light takes from Sun to reach Earth is: 8 minutes
The minimum velocity necessary to put a satellite into orbit is called : Orbital Velocity
Planet Mercury completes one rotation around the sun in how many days: 88
