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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 9 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 lump of sandstone that feels like sandpaper, A shiny glassy piece of black obsidian, A pinch of fine gray clay powder

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 jagged chunk of pink granite, A smooth black beach pebble, Brown silt left in a dried puddle

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 scoop of dark crumbly garden soil, A gray lump of lava rock full of holes

Rough to touchSmooth to touchMade of tiny loose grains

LessonPrint · 2-PS1-1 · Set 9 · free to copy for classroom use

Answer key — Sorting the Rock Tray

Set 9. Prints on its own sheet.

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