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Exam_1_2007_A_v2_key

# Exam_1_2007_A_v2_key - NAME GT ID LAB SECTION Page 1 of 9...

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NAME:_______________________________ LAB SECTION ________________ GT ID#________________________ Page 1 of 9 EAS 1600 - INTRODUCTION TO ENVIRONMENTAL SCIENCES Fall, 2007 Exam 1 – 09/21/07 < Relevant formulas, etc are included at the end of the exam < Place your name on each page < This is a closed-book exam; all are expected to comply with Georgia Tech Honor Code I am aware and in compliance with the Georgia Tech Honor Code. I also agree to abide by the grading policies of this class. Signature: ____________________________________________________________ A

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NAME:_______________________________ LAB SECTION ________________ Page 2 of 9 Answer the following multiple choice questions (1 – 8) by circling the appropriate answer. 1. Approximately how many hours of sunlight will Beijing receive today (latitude = 40 o N)? (3 points) a) 10 b) 8 c) 12 d) 14 2. Consider a metal plate that orbits the Sun at the same distance as the Earth. The plate is oriented that the Sun’s light strikes it at a 30 o degree angle with respect to a normal line from the surface. What is the intensity of the radiation striking the plate? (3 points) a) 1512 W m -2 b) 1186 W m -2 c) 685 W m -2 d) 969 W m -2 3. The eruption of the volcano Mt. Pinatubo in 1991 led to 1992 being the coldest year in the last part of the 20 th century. Why? (3 points) a) The eruption removed a lot of carbon dioxide from the atmosphere. b) Acid rain from the explosion enhanced carbon dioxide loss from the atmosphere. c) The albedo of the Earth was increased. d) The albedo of the Earth was decreased. 4 . A star emits light with a maximum intensity at a wavelength of 1400 nm. What is the temperature of the star? (3 points) a) 207 K b) 207 o C c) 2070 K d) 2343 o C