1) Which type of cloud is made of ice crystals? a) Cirrus clouds b) Cirrocumulus clouds c) Cumulonimbus clouds d) Nimbostratus clouds 2) What is the largest helicopter ever built? a) Pigeon Mil V-12 b) Bell 47 c) SA 315B Lama d) An-225 Mriya 3) What is the coldest part of Earth's atmosphere? a) Troposphere b) Stratosphere c) Mesosphere d) Thermosphere 4) What is a rare form of lightning that arcs upward in a brilliant blue flash? a) Sprites b) Blue jets c) Noctilucent clouds d) Birds & planes by Cindy Nhi 5) Who was the first person to break the sound barrier in freefall? a) John Bell b) Aleksandr Chelyabinsk c) Alan Eustace d) Felix Baumgartner 6) Which type of cloud can blanket the sky? a) Cirrus clouds b) Cumulonimbus clouds c) Nimbostratus clouds d) Cirrocumulus clouds 7) Which natural phenomenon is caused by particles from the sun exciting atoms in the atmosphere? a) Aurora (Northern/Southern Lights) b) Chelyabinsk Meteor Airburst c) Sutter's Mill Meteor Breakup d) Sprites 8) Which aircraft holds the record for the highest flight of a helicopter? a) Bell 47 b) SA 315B Lama c) VSS Unity d) SR-71 Blackbird 9) What is the highest flying bird? a) White stork  b) Andean Condor c) Ruppell's Griffon Vulture d) Whooper swan  10) What are jet streams?  a) A type of cloud formation b) High-altitude gliders c) Birds that migrate at high altitudes d) Bands of strong winds in the atmosphere 11) Which layer of the atmosphere is known for containing the ozone layer? a) Troposphere b) Stratosphere c) Mesosphere d) Thermosphere 12) Which aircraft holds the altitude record for a winged aircraft? a) NASA Helios HP01 b) De Havilland Vampire c) Spitfire d) F-35 13) Which type of clouds are found in polar regions and scatter light in colourful ways? a) Cirrus clouds b) Nimbostratus clouds c) Nacreous clouds d) Noctilucent clouds 14) Which plane was the first to cross the English Channel? a) Sopwith Camel b) P-51 Mustang c) Spitfire d) Blériot XI 15) At what altitude do the space shuttle boosters eject?  a) 56000 metres b) 26000 metres c) 36000 metres d) 46000 metres 16) Where do most meteors burn up? a) Troposphere b) Stratosphere c) Mesosphere d) Themosphere

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