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Sorting the Rock Tray is a free printable Grade 2 science worksheet on classifying rocks and soils by how they look and feel, aligned to NGSS performance expectation 2-PS1-1. It prints 3 questions with an answer key on its own sheet of paper, in 25 versions that each ask different questions, so no two students in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.

Set 24 of 25 · the same problems every time you open this link.

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Set 1 has all 25 in a single PDF. All 25 sets ask different questions.

Sorting the Rock Tray

2-PS1-1

NameDate

Sort each one into the right group.

1.Sort each one: Rough to touch or Smooth to touch or Made of tiny loose grains?

Sort: A pinch of fine gray clay powder, A jagged chunk of pink granite, A flat dark gray slate tile

Rough to touchSmooth to touchMade of tiny loose grains
2.Sort each one: Rough to touch or Smooth to touch or Made of tiny loose grains?

Sort: Brown silt left in a dried puddle, A shiny glassy piece of black obsidian, A lump of sandstone that feels like sandpaper

Rough to touchSmooth to touchMade of tiny loose grains
3.Sort each one: Rough to touch or Smooth to touch or Made of tiny loose grains?

Sort: A smooth black beach pebble, A handful of dry yellow sand, A sharp little chip of gravel

Rough to touchSmooth to touchMade of tiny loose grains

LessonPrint · 2-PS1-1 · Set 24 · free to copy for classroom use

Answer key — Sorting the Rock Tray

Set 24. Prints on its own sheet.

  1. 1.1. A flat dark gray slate tile — Smooth to touch 2. A jagged chunk of pink granite — Rough to touch 3. A pinch of fine gray clay powder — Made of tiny loose grains
  2. 2.1. A lump of sandstone that feels like sandpaper — Rough to touch 2. A shiny glassy piece of black obsidian — Smooth to touch 3. Brown silt left in a dried puddle — Made of tiny loose grains
  3. 3.1. A handful of dry yellow sand — Made of tiny loose grains 2. A sharp little chip of gravel — Rough to touch 3. A smooth black beach pebble — Smooth to touch

Last reviewed 2026-09-05. Aligned to 2-PS1-1 of the Next Generation Science Standards.