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item# DD357


…and explore concepts in depth—from real rock samples and erosion trays to overhead transparencies, vocabulary cards and full-color…

grades: 4th grade - 6th grade
ages: 9 years - 11 years
item# EE702

$3.99 - $37.99

…about everything from carnivorous plants to weathering and erosion. Plus, we’ve included an in-depth answer key for easy self-checking.…

grades: 2nd grade
ages: 7 years