Explains how polar bears have been affected by global warming and the shrinking ice caps and describes how they have adapted to their arctic habitat. Part of the "Built for Cold: Arctic Animals" series. Interest Level: 3-6 Reading Level: 5.3 ATOS Book Level: 5.4 AR Interest Level: MG AR Points: .5 AR Quiz: 142601EN Reading Counts Level: 6.4 Reading Counts Points: 3 Lexile Measure: 950 Lexile Code: IG (Illustrated Guide) Guided Reading Level: P.