The distinct smell of LPG is actually the scent given off by what additive? toluene false cyclopentane false ethyl mercaptan true benzene false Single Nitrogen comprises the majority of what subsystem of Earth? Atmosphere true Hydrosphere false Geosphere false Biosphere false Single Which of the following minerals serves as an important source of fuel for nuclear power plants? Zincite false Uraninite true Columbite-Tantalite (Coltan) false Spodumene false Single The Bacon-Manito Geothermal Power Plant straddles the boundary of what provinces? Abra and Ilocos Sur false Albay and Sorsogon true Negros Oriental and Negros Occidental false Zamboanga del Norte and Misamis Occidental false Single What mineral is found on the tip of pencils and gives it its distinct greyish-black color? galena false hematite false chromite false graphite true Single Where is majority of the freshwater on Earth found? In the oceans false In underground aquifers false In rivers and lakes false Frozen in continental ice sheets true Single Which of the following minerals is an ore of copper? Sphalerite false Luzonite true Cassiterite false Perovskite false Single Which of the following countries has the highest greenhouse gas emission per person? United States true United Kingdom false India false China false Single What is the largest freshwater lake in the Philippines? Laguna de Bay true Lake Marawi false Lake Taal false Lake Balinsasayao false Single What is the largest dam in the Philippines? Magat dam false Angat dam false La Mesa dam false San Roque dam true Single