• 1. 
    Which of these is not part of the atmosphere?

  • stratosphere
  • mesophere
  • cybersphere
  • ionosphere
  • 2. 
    What do scientists call a cloud that does not carry rain?

  • dead cloud
  • dry cloud
  • quiet cloud
  • arid cloud
  • 3. 
    How fast does a raindrop fall, in meters per second, during a cloudburst?

  • 9
  • 5
  • 7
  • 3
  • 4. 
    What is a cloud formed behind an airplane called?

  • condor
  • contrail
  • console
  • compound
  • 5. 
    Which of these is lighter than air?

  • helium
  • iron
  • water
  • oil
  • 6. 
    Which of the following is not a type of cloud?

  • cumulus
  • syllabus
  • stratus
  • cirrus
  • 7. 
    Which of these is not a greenhouse gas?

  • methane
  • oxygen
  • nitrous oxide
  • ozone
  • 8. 
    Which altitude of clouds is most likely to produce rain?

  • high
  • very high
  • low and middle
  • space clouds
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