Problem
    How are magnetic storms on Earth related to sunspot activity?

Purpose (complete)
      The purpose of the is lab is to _

Skills Focus (page 551 - data table and a graph you will need to use in this lab)
    graphing, interpreting data

Materials
    graph paper
    ruler

Procedure:
    Use the data in the table of Annual Sunspot Numbers to name a line graph of sunspots activity between 1972 and 2002
    On the graph, label the  x-axis Year.   Use a scale with 2 year intervals, from 1972 to 2002
    Label the y-axis Sunspot Number  Use a scale of 0 through 160 in intervals of 10.
    Graph a point for the sunspot number for each year.
    Complete your graph by drawing lines to connect the points.

Analyze and Conclude
    Graphing :  Base on your graph, which years had the highest Sunspot Number?  _____________________________
                    The Lowest Sunspot Number?______________________________

    Interpreting Data: How often does the cycle of maximum and minimum sunspot activity?

    Interpreting Data:  When was the most recent maximum sunspot activity?
                                 The most recent minimum sunspot activity?

    Inferring: Compare your sunspot graph with the magnetic storms graph.  What relationship can you infer between periods of  high sunspot activity and magnetic storms?  Explain.

    Communicating: Suppose you are an engineer working for an electric power company.  Write a brief summary of your analysis of sunspot data.  Explain the relationship between sunspot number and electrical disturbances on Earth.