Hard SOF National Science Olympiad (NSO/ISO) · NSO Level 1 · . Sample Which gas is essential for burning? A Oxygen B Nitrogen C Carbon dioxide D Helium Submit Answer Show Explanation Mark as Completed Mark as Important Mark for Review
An object is dropped from a height of 180 m. Find the time it takes to reach the ground. (Take g = 10 m/s², ignore air resistance) SOF National Science Olympiad (NSO/ISO) . Easy · Physics · 2025 See Explanation
Find the mass of 5 mole(s) of ammonia (NH3). (Molar mass = 17 g/mol) SOF National Science Olympiad (NSO/ISO) . Easy · Chemistry · 2024 See Explanation
Which tissue in plants is responsible for the transport of water and minerals from roots to other parts? SOF National Science Olympiad (NSO/ISO) . Easy · Biology · 2026 See Explanation
A car travels 240 km in 4 hours. What is its average speed? SOF National Science Olympiad (NSO/ISO) . Hard · Physics · 2024 See Explanation
What is the minimum distance required between a sound source and a reflecting surface for a human ear to hear a distinct echo? SOF National Science Olympiad (NSO/ISO) . Hard · Physics · 2026 See Explanation