| http://www.w3.org/ns/prov#value | - Power of NatureGrades 6???9, ESExplore severe weather conditions and natural disasters such as volcanoes, tornadoes, and hurricanes through a Jeopardy-style game.Virginia: 6.3; 6.6; ES.12North Carolina: 7.E.1.3; EEn.2.1.1; EEn.2.1.2; EEn.2.1.4
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