Question 1
Which of the following is a consequence of acid rain?
◦ the dying of forests
◦ damage to aquatic ecosystems (rivers and lakes)
◦ changes in soil chemistry
◦ forest and soil damage only
◦ all of these
Question 2
Which of the following is correct regarding the sunspot cycle?
◦ The cycle averages 11 years.
◦ There is a forecasted minimum for 2013.
◦ There is no cycle.
◦ The cycle varies from 17 to 34 years.