studyit.govt.nz/Earth_and_Space_Science/level/18
StudyIt has advice on how to deal with Level 2 ESS assessments, some exemplars, and a BUNCH of redirect links to useful resources -- NASA, Waikato Regional Council, etc.
www.nzqa.govt.nz/ncea/assessment/search.do?query=Earth+and+Space+Science&view=exams&level=02