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1. The most abundant gas in the atmosphere by volume is gas comprises 78% of the Earth atmosphere by volume. a. Oxygen c. Carbon Dioxide b.Argon d. Nitrogen . This 2. The definition of a variable gas is a gas that varies significantly from time to time and place to place. The most significant variable gas by volume in the planetary boundary layer in the atmosphere is: a.Ozone c. Oxygen b. Water vapor. Carhon dioxide 3. An isobar is a line of constant a.Pressure c. Temperature b. Density d. Dewpoint 4, Which of the following best explains how pressure decreases with height in the Earth's atmosphere? a. It decreases at a constant rate (linear decrease) b. It decrease quickly at first then more gradually (exponential decrease) ¢. It decreases at a rate of 9.8 millibars per kilometer d. It decreases in the troposphere, increases in the stratosphere, then decreases to the top of the atmosphere 5. In the vertical dimension, the upper level jet stream is located closest to which mandatory synoptic scale pressure level? a. The 850 millibar level (1,500 meters) h. The surface c. The 500 millibar level (5,300 meters) d. The 300 millibar level (9,500 meters) 6. The seasons of Spring, Summer, Winter, and Fall are a direct result of which phenomenon? a. The sun's energy output and the Earth's proximity to the sun b. Shifting of ocean currents c. The 23.5 ° tilt of the Earth from vertical d. The jet stream 7. refers to the horizontal transport of air while is the vertical transport of air. a. Advection, convection 4. Convection, advection 8. Which of the following has the highest albedo and thus more reflected solar radiation? a.Fresh snow c. Water b.Grass d. Blacktop 9. Which of the following is NOT a primary "control" of climate? a. Altitude _ c. Daily weather hb. Latitude d. Ocean currents 10. Water has a heat capacity. This means a large amount of energy is needed to raise the temperature of water relative to other substances. a, Low b. High 11. A one degree temperature change on the Fahrenheit scale is equal a degree change on the Celsius scale. a.0.56 ¢.18 b.0.90 4.3.6 
