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sio20 - SIO 20 Midterm Examination 1 v1 Winter 2009 The...

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SIO 20 - Midterm Examination 1 v1 – Winter 2009 1/6 The correct answers are highlighted below. Note that there were four versions of the exam. Each version had the same questions, just in a different order. Circle the letter corresponding to the best answer. 1. Over the last 50 years, the atmospheric concentration of carbon dioxide (CO 2 ) a. decreased b. increased c. remained constant 2. The cooling of the ground to produce dew is mainly the result of: a. convection b. radiational cooling c. advection d. mixing 3. Radiation fog forms best: a. during the day when the surface is warming b. during the night when the surface is cooling c. when the air near the surface is initially very dry d. when clouds emit infrared radiation towards the surface 4. When fog “burns off” it: a. evaporates from the ground up b. dissipates by lifting away from the ground c. settles to the ground in the form of rain or drizzle 5. Low clouds slow surface cooling at night compared to clear skies because: 6. Evaporation of water from the ocean in to the air above would _______ if the wind speed increases. a. increase b. decrease c. stay the same 7. Assuming that the night will remain clear, calm and unsaturated, the predicted minimum temperature is 36°F. Suddenly the wind speed increases unexpectedly and remains gusty throughout the night. The minimum temperature will most likely be:
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