NGSS · Grade 4

4-ESS2-1 Measure effects of weathering and the rate of erosion by water

Make observations and/or measurements to provide evidence of the effects of weathering or the rate of erosion by water, ice, wind, or vegetation.

Clarification statement: Examples of variables to test could include angle of slope in the downhill movement of water, amount of vegetation, speed of wind, relative rate of deposition, cycles of freezing and thawing of water, cycles of heating and cooling, and volume of water flow.

Assessment boundary: Assessment is limited to a single form of weathering or erosion.

Why water teaches this standard well

Water is the erosion agent this standard names first, and slope angle and volume of water flow are its suggested test variables, both easy to control with a stream table or a soil-filled gutter. The same physics explains why utilities armor riverbanks and manage stormwater velocity in real drainage channels.

Materials tagged with this code are written to the full standard , including its clarification statement and assessment boundary, and each carries a written note explaining the alignment. See how we review materials.

9 materials aligned to 4-ESS2-1

Lesson plans

Worksheets

Grade 4 Worksheet

Measuring How Far the Pennard Brook Bank Moved

A grade 4 worksheet using a year of post-to-bank measurements at three bends of a fictional brook, with subtraction items comparing erosion, cover, and deposition.

Science 30 min Answer key

Math problem sets

Grade 4 Math problem set

Erosion Rates from Sedgeholt School's Four Slope Trays

Nine grade 4 problems using a four-tray erosion test record, turning grams of washed-out soil into rates per minute and comparing trays that differ only in slope.

Science 35 min Answer key

Labs & experiments

Grade 4 Lab / experiment

Timing How Fast Quillen Bend's Muddy Water Clears

A two-session grade 4 lab timing how sand, garden soil, and clay settle out of shaken jars, then linking the results to the settling basin at a water plant.

Science 2 sessions, ~60 min total Answer key

Grade 4 Lab / experiment

Ice Wedging Under Gattock Road: A Freeze-and-Thaw Lab

A grade 4 lab running three freeze-and-thaw cycles on wet and dry chalk samples to show why a fictional town's roads and pipes crack most in late winter.

Science 4 sessions, ~90 min total Answer key

Classroom activities

Grade 4 Classroom activity

Holding the Chandry Creek Bank: A Cover Fair Test

A grade 4 station rotation testing bare soil, grass mat, and gravel on identical sloped trays to see which cover keeps a fictional creek bank from washing away.

Science 50 min Answer key

Graphic organizers