4.ESS.2: The surface of Earth changes due to weathering

Rocks and Erosion: How Land Changes Shape Grade 4

Why some rocks scratch and some fizz, how a trickle of water carves a canyon, what keeps a hillside in place, and how a boulder ends up as sand. Four hands-on lessons on rocks, weathering and erosion.

• How do rocks become sand? 50–60 min, plus a 5 min check the next day

  Students shake sugar cubes in a jar for set times and measure how their sharp corners wear into rounded grains, then watch frozen water push a plug out of a sealed straw. They explain how tumbling and ice break rock into smaller and smaller pieces, all the way down to sand.

Printable practice for 4.ESS.2

These pages practise a closely related idea; the match to 4.ESS.2 is partial.

• Rocks and Erosion: How Land Changes Shape workbook included with the unit

  4 readings, 3 English-support pages, 3 practice pages, 1 word wall, 1 unit review, 1 unit test, with answer keys.

• Living with Water: Salt, Rice and the Mekong workbook included with the unit

  2 readings, 1 word wall, 1 practice page, 1 unit review, 1 unit test, with answer keys.

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