About this worksheet
A two-page reading passage on the gray wolves of Yellowstone for 5th grade science. It tells how wolves were gone by the late 1920s, how elk then overgrazed willow and aspen, and how 31 wolves from Canada were released in 1995 and 1996. Then it describes the trophic cascade that followed and what scientists still debate. Students answer key-detail questions, a vocabulary item and two true or false statements with evidence. Last, they complete a food web and explain the debate. The 6 pages align to NGSS 5-LS2-1, and an answer key closes the set.
