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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 5 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: Brown silt left in a dried puddle, 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: A sharp little chip of gravel, A shiny glassy piece of black obsidian, A scoop of dark crumbly garden soil

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 spoonful of red desert sand, A gray lump of lava rock full of holes

Rough to touchSmooth to touchMade of tiny loose grains

LessonPrint · 2-PS1-1 · Set 5 · free to copy for classroom use

Answer key — Sorting the Rock Tray

Set 5. 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. Brown silt left in a dried puddle — Made of tiny loose grains
  2. 2.1. A scoop of dark crumbly garden soil — Made of tiny loose grains 2. A sharp little chip of gravel — Rough to touch 3. A shiny glassy piece of black obsidian — Smooth to touch
  3. 3.1. A gray lump of lava rock full of holes — Rough to touch 2. A smooth black beach pebble — Smooth to touch 3. A spoonful of red desert sand — Made of tiny loose grains

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