Explanation : A seismograph is an instrument used to detect and record earthquakes. Generally, it consists of a mass attached to a fixed base. During earthquake, the base moves but the mass does not move.
Explanation : Mercury is the smallest and innermost planet in the solar system. It is the nearest planet to the Sun, Its orbital period around the Sun is 88 days.
Explanation : 'Gir National Park' is situated in Gujarat. It was established in 1965 and its region is the sole home of the Asiatic lion (panthera leo persica).