Which gas in the upper atmosphere shields Earth's surface from ...

[09madisonrousseau09]

Which gas in the upper atmosphere shields Earth's surface from the sun's harmful ultraviolet rays?
 A) nitrogen
  B) methane
  C) ozone
  D) chlorofluorocarbons

Question 2

The forecasting technique that produces several versions of a forecast model, each beginning with slightly different weather information to reflect errors in the measurements, is called ____ forecasting.
 A) climatology
  B) probability
  C) persistence
  D) ensemble

[mrphibs]

Answer to Question 1

C

Answer to Question 2

D

[09madisonrousseau09]

Thank you

[mrphibs]

Happy to help you