The questions you will answer in this FACTivity are: How do the number of earthquakes from the 1990s compare to the number of earthquakes in the 2000s? How do the magnitudes of the earthquakes compare between the two time periods? Materials (for each student or group of students): Two earthquake data tables ( included ) Graphing paper ( included ) Pencils Highlighters Topics: Data Tables, Earthquakes, Graphing data.