Performance Expectations: 4-ESS2-2: Make observations and/or measurements to provide evidence of the effects of weathering or the rate of erosion by water, ice, wind, or vegetation.

Disciplinary Core Idea: ESS2.E: Living things affect the physical characteristics of their regions. (4- ESS2-1)

Cross cutting concepts: Patterns ▪Patterns can be used as evidence to support an explanation. (4-ESS2-2)

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