Above ________ kilometer(s), the atmospheric pressure is so slight as to not register on an ordinary barometer.
A) 0.8
B) 8
C) 80
D) 800
E) 8,000
Question 2
Which of the following is NOT an important function of Earth's atmosphere?
A) Insulates the surface against temperature extremes
B) Maintains a water supply
C) Supplies the oxygen for life
D) Screens out much of the Sun's ultraviolet radiation
E) Maintains an envelope of pure oxygen