Where Does Soil Come From? 

Trees come from seeds, and birds come from eggs, but where does all the soil and dirt come from?
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Second Grade Next Generation Science Standards
Disciplinary Core Ideas:
ESS1.C: The History of Planet Earth - Some events happen very quickly; others occur very slowly, over a time period much longer than one can observe (2-ESS1-1).
ESS2.A: Earth Materials and Systems - Wind and water can change the shape of the land (2-ESS2-1).
Performance Expectations:
2-ESS1-1. Use information from several sources to provide evidence that Earth events can occur quickly or slowly.
2-ESS2-1. Compare multiple solutions designed to slow or prevent wind or water from changing the shape of the land.
SOURCES:
www.soils4kids.org/about
www.qld.gov.au/environment/la....
sciencing.com/forces-cause-we...
www.geolsoc.org.uk/ks3/gsl/ed...
www.geolsoc.org.uk/ks3/gsl/ed...
oceanservice.noaa.gov/facts/s...
people.ku.edu/~stalder/KS-shal...
www.nrcs.usda.gov/Internet/FS...
vro.agriculture.vic.gov.au/dpi...
www.nrcs.usda.gov/wps/portal/....
www.geolsoc.org.uk/ks3/gsl/ed...