Radio waves travel ……then sound wave: Faster
Photo voltaic cells convert solar energy into electricity through a process: chemical
Mars: Mercury : Venus: They are the planet nearest to the earth
Mass is to Kilogram as Universe is to: Solar System
Who discovered that planets revolve in an elliptical orbits: Johannes Kepler
Table Mountain is located in the country: South Africa
Caledonia was the Roman Empire name for which modern day country: Scotland
Which is only planet in our solar system not named after a Roman or Greek god: Earth
Nearest star to sun is: Proxima Centurai
Which one of the following is second largest planet in our solar system: Saturn
