CIVE 401, Civil Engineering and Society, Fall 2006, Midterm, Section 02 Your name (Last, [MI, ] First):          Your name:    Your Red ID:         Your RED ID:    1. What year was the beginning of the Environmental Revolution?     1.  1920 2.  1945 3.  2005 4.  1980 5.  1970    Your answer:    2. When was the world wide web introduced to average users?     1.  1950 2.  1985 3.  1994 4.  1776 5.  2002    Your answer:    3. When was the first reinforced concrete bridge built?     1.  1975 2.  1985 3.  2001 4.  1875 5.  1939    Your answer:    4. What is the approximate chemical composition of the atmosphere?     1.  78% N2; 21% O2, 1% Ar 2.  50% O2; 49% N2, 1% Ar 3.  79% N2; 21% O2 4.  79% O2; 21% N2 5.  99% O2; 1% CO2    Your answer:    5. What is the process responsible for the presence of nitrogen in the atmosphere?     1.  nitrification 2.  denitrification 3.  photosynthesis 4.  evaporation 5.  sublimation    Your answer:    6. What value approximates the annual rate of increase of CO2 in the atmosphere?     1.  1 ppm 2.  0.001 ppm 3.  0.01 ppm 4.  10 ppm 5.  0.1 ppm    Your answer:    7. What is the process directly responsible for sediment in the flowing surface waters?     1.  tectonism 2.  salinity 3.  vulcanism 4.  subsidence 5.  erosion    Your answer:    8. What is the average period of surface-water recycling?     1.  6 days 2.  12 days 3.  365 days 4.  180 days 5.  3 years    Your answer:    9. What is the current concentration of CO2 in the atmosphere?     1.  130 ppm 2.  255 ppm 3.  528 ppm 4.  378 ppm 5.  792 ppm    Your answer:    10. What controls the stability of the biosphere?     1.  Rainfall 2.  Temperature 3.  Law of Diffusion 4.  Wind 5.  Law of Averages    Your answer:      Your request was processed at  06:00:56 am on February 20th, 2026   [ 260220  06:00:56 ]. Please print completed form for your records.