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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 23 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 shiny glassy piece of black obsidian, Brown silt left in a dried puddle, A bumpy brown rock from a field wall

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: A lump of sandstone that feels like sandpaper, A spoonful of red desert sand, A polished white marble egg

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 small round pebble from a stream, A pinch of fine gray clay powder, A jagged chunk of pink granite

Rough to touchSmooth to touchMade of tiny loose grains

LessonPrint · 2-PS1-1 · Set 23 · free to copy for classroom use

Answer key — Sorting the Rock Tray

Set 23. Prints on its own sheet.

  1. 1.1. A bumpy brown rock from a field wall — 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
  2. 2.1. A lump of sandstone that feels like sandpaper — Rough to touch 2. A polished white marble egg — Smooth to touch 3. A spoonful of red desert sand — Made of tiny loose grains
  3. 3.1. A jagged chunk of pink granite — Rough to touch 2. A pinch of fine gray clay powder — Made of tiny loose grains 3. A small round pebble from a stream — Smooth to touch

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