 resourceType_txtF_mv:Classroom Activities language:English publisher_txtF_mv:United States Department of Energy DOE gradeLevel_txtF_mv:4 gradeLevel_txtF_mv:7 ngssCC_txtF_mv:Cause and effect: Mechanism and explanationResource Type: Classroom Activities Language: English Organization: United States Department of Energy DOE Grade Level: 4 Grade Level: 7 NGSS Crosscutting Concepts: Cause and effect: Mechanism and explanation 