2-ESS1-1: Earth Events - Slow and Quick

Use information from several sources to provide evidence that earth events can occur quickly or slowly. (Stability and Change)

Clarification Statement: Examples of events and timescales could include volcanic explosions and earthquakes, which happen quickly and erosion of rocks, which occurs slowly.

Assessment Boundary: Assessment does not include quantitative measurements of timescales.


The following assessments were created by science teachers hoping to better understand the NGSS. In most cases teachers went from standard to assessment in around an hour.  These are drafts and should be used accordingly. Feel free to improve these assessments or contribute to the collection. Learn more about assessment design here.




Earth events
 - Quick (e.g. flood, storm, volcano, earthquake, landslide)
 - Slow  (e.g. weathering and erosion of rock)
Stability and Change


Learning Plans


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