Q33: Tropos in Greek means to turn over
Q34: Ozone molecules break apart naturally in the
Q35: PM10 is more unhealthy than PM2.5.
Q36: Most anthropogenic pollutants come from burning fossil
Q37: Most meteors burn up in the mesosphere.
Q39: Water vapor can occupy up to 4%
Q40: The atmosphere is kept pinned to Earth
Q41: Which is a methane sink?
A)photosynthesis
B)ultraviolet radiation
C)the oceans
D)rainfall
Q42: Which is a water-vapor sink?
A)evaporation
B)condensation
C)ultraviolet radiation
D)fossil fuels
Q43: What did the Montreal Protocol mandate?
A)the phaseout
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