MCQs / Q&AMisc. MCQs / Q&A About 50% of the Earth’s crust, including the waters on the Earth and atmosphere, is? Share About 50% of the Earth’s crust, including the waters on the Earth and atmosphere, is? Oxygen (correct) Cabon Dioxide Silicon Clay Related posts: Acid rain is mainly caused by emissions of __________ in the atmosphere? Most of the ozone in the atmosphere is concentrated in the _____________? Noah’s Ark had two of everything including what feature? Ozone layer prevents ______________ radiation from entering the atmosphere? The atmosphere of moon consists of______________? The bodyguard of the Earth is __________ that save the Earth from many Comets and Asteroids. The Carbon Dioxide in the atmosphere, by volume, is_______? The instrument which i specially design for recording earth quake wave is called seismograph which measure earth quake waves on a ____________? The principal constituent of the atmosphere of the Earth is? The unit to measure the quantity of Ozone in atmosphere is? Share FacebookTwitterGoogle+ReddItWhatsAppPinterestEmail