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Why It Is That Shape is a free printable Kindergarten to Grade 2 science worksheet on how the shape of a structure helps it do its job, aligned to NGSS performance expectation K-2-ETS1-2. It prints 2 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 1 of 25 · the same problems every time you open this link.

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All 25 sets ask different questions.

Why It Is That Shape

K-2-ETS1-2

NameDate

Draw a line from each shape to what it does.

1.Draw a line from each one to its match.
  • A bridge with a triangle frame
  • A net with small holes
  • A roof that slopes
  • A tower that is wide at the bottom
  • A.Rain runs off instead of collecting
  • B.It stands up without toppling
  • C.It catches small things and lets water through
  • D.The triangles keep it from bending
2.Draw a line from each one to its match.
  • A groyne built out across a beach
  • A dam with a wide base
  • A wall built with the long side down
  • A pipe that is round
  • A.Water flows through without catching on corners
  • B.It traps sand being carried along the shore
  • C.It is harder to push over than a tall thin one
  • D.It holds back the water pushing on it

LessonPrint · K-2-ETS1-2 · Set 1 · free to copy for classroom use

Answer key — Why It Is That Shape

Set 1. Prints on its own sheet.

  1. 1.1. A bridge with a triangle frame — D (The triangles keep it from bending) 2. A net with small holes — C (It catches small things and lets water through) 3. A roof that slopes — A (Rain runs off instead of collecting) 4. A tower that is wide at the bottom — B (It stands up without toppling)
  2. 2.1. A groyne built out across a beach — B (It traps sand being carried along the shore) 2. A dam with a wide base — D (It holds back the water pushing on it) 3. A wall built with the long side down — C (It is harder to push over than a tall thin one) 4. A pipe that is round — A (Water flows through without catching on corners)

Questions about Why It Is That Shape

What does the Why It Is That Shape worksheet cover?

It practices how the shape of a structure helps it do its job — 2 questions for Kindergarten to Grade 2, all on NGSS K-2-ETS1-2: Draw or model how an object's shape helps it do its job. The instruction to students is “Draw a line from each shape to what it does”, and the answer key follows on the next sheet.

Which NGSS performance expectation does Why It Is That Shape practice?

K-2-ETS1-2, under Engineering Design for Kindergarten to Grade 2. The published performance expectation reads: “Develop a simple sketch, drawing, or physical model to illustrate how the shape of an object helps it function as needed to solve a given problem.” The worksheet assesses that performance expectation rather than a paraphrase of it.

What age or grade is this worksheet for?

Why It Is That Shape is written for Kindergarten to Grade 2, typically ages 7-8. It is one of the sheets on K-2-ETS1-2, so it suits any student working at that standard — including older students revisiting it and younger ones working ahead.

Does Why It Is That Shape come with an answer key?

Yes. All 2 answers are generated from the same problems as the questions, so the key cannot drift out of step with the sheet. It starts on a fresh sheet of paper, after the questions, so it is not handed out with the class by accident.

How many different versions of Why It Is That Shape can I print?

25 — one per student, and all 25 ask different questions. Set 1 downloads the whole class as a single PDF. Every version is fixed to its own address, so a sheet printed today holds the same problems when you reopen it next week.

Is Why It Is That Shape free to print and photocopy?

Yes. Why It Is That Shape, its answer key and its 25 versions are free to print and photocopy for your own class, with no account, no email capture and no subscription at the download step. Please do not resell them or republish them as your own.

Is there a lesson plan to teach K-2-ETS1-2?

Yes — “Why It Is That Shape” is a 50-minute Kindergarten to Grade 2 plan for K-2-ETS1-2, timed section by section, with the misconceptions to expect and an exit ticket. Why It Is That Shape is the practice that follows it.

More practice for K-2-ETS1-2

Draw or model how an object's shape helps it do its job.

Teaching this next? Why It Is That Shape is the 50-minute plan for it, with the misconceptions to expect.

All Kindergarten to Grade 2 worksheets

Last reviewed 2026-09-05. Aligned to K-2-ETS1-2 of the Next Generation Science Standards.