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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 10 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 gray lump of lava rock full of holes, A smooth black beach pebble

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 handful of dry yellow sand, 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 small round pebble from a stream, A jagged chunk of pink granite, Brown silt left in a dried puddle

Rough to touchSmooth to touchMade of tiny loose grains

LessonPrint · 2-PS1-1 · Set 10 · free to copy for classroom use

Answer key — Sorting the Rock Tray

Set 10. Prints on its own sheet.

  1. 1.1. A gray lump of lava rock full of holes — Rough to touch 2. A pinch of fine gray clay powder — Made of tiny loose grains 3. A smooth black beach pebble — Smooth to touch
  2. 2.1. A handful of dry yellow sand — Made of tiny loose grains 2. A lump of sandstone that feels like sandpaper — Rough to touch 3. A shiny glassy piece of black obsidian — Smooth to touch
  3. 3.1. A jagged chunk of pink granite — Rough to touch 2. A small round pebble from a stream — Smooth to touch 3. Brown silt left in a dried puddle — Made of tiny loose grains

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