Page 264 - NS-2 Textbook
P. 264

METEOROLOGY                                                                                           259

           B.  nimbostratus      E.  cirrus                    Vocabulary
           C.  cumulonimbus      F.  altocumulus
                                                              hygroscopic nuclei        fog
        8.  How were early navigators often able to find previ-
                                                              cirrus                    stratus
           ously uncharted islands?
                                                              cumulus                  nimbus
        9.  What is precipitation?
       10.  A.  How do raindrops form?                        cmnulonimbus             nin1bostratus
                                                              coalescence               drought
           B.  What is coalescence, and how does it happen?
                                                              silver-iodide crystals    thtmderhead
       11.  What two techniques are used in modem rainmaking?
                                                              cloud "seeding"          hailstone
       12.  A.  What is sleet?
           B.  What causes it to occur?                       "ceiling U                advection fog
       13.  W1,at is hail, and how are hailstones formed?     IIsea smoke"             frontal fog
       14.  What is fog, and how is it formed?                visibility                advection
       15.  A.  Where are the two most famous natural sea-fog
              areas located?
           B.  Why do they have such frequent fog?
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