1) In what layer are there clouds? a) stratosphere b) troposphere c) mesosphere d) thermosphere 2) The ozone layer is found in the .... a) troposphere b) stratosphere c) mesosphere 3) In which temperature of the air are the molecules far apart? a) warm air b) cold air 4) Where would you find less air molecules? a) bottom of mountain b) top of mountain 5) In what layer do most meteors burn up? a) troposphere b) thermosphere c) mesosphere 6) Which of these would you find in the THERMOSPHERE? a) Northern LIghts b) satellites c) ozone layer d) airplanes 7) Satellites orbit in the .... a) stratosphere b) exosphere c) thermosphere 8) When you climb a mountain, the TEMPERATURE ... a) gets warmer b) gets colder 9) 78% of the atmosphere is made of what gas? a) oxygen b) nitrogen c) carbon dioxide 10) The weight of the air pushing down on Earth a) air pressure b) temperature c) weather 11) In what temperature of air are the molecules close together? a) warm air b) cold air 12) What is the missing layer: troposphere, __________, mesosphere a) stratosphere b) thermosphere c) exosphere 13) 21% of the atmosphere is made of what gas? a) oxygen b) nitrogen c) water vapor 14) Which temperature of air is heavier? a) warm air b) cold air 15) As you climb a mountain, the AIR PRESSURE ..... a) decreases (less) b) increases (more)

Atmosphere

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