In Earthquakes, young readers learn the earth’s crust and upper mantle are broken up into huge pieces called plates that are carried along by moving magma in the lower mantle. The sudden release of 2 plates that are stuck at their edges causes an earthquake and seismic waves.
 
Softcover, 8×8 in., 24 pages
Word Count 328,  Lexile Measure 610L
A pronunciation guide is included. Reading Level 1-3, Interest Level 2-5.