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Built That Way for a Reason is a free printable Kindergarten to Grade 2 science worksheet on how the shape of an object helps it work, 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.

Built That Way for a Reason

K-2-ETS1-2

NameDate

Draw a line from each shape to the job it does.

1.Draw a line from each one to its match.
  • A drum has a stretched skin
  • A mirror is flat and smooth
  • A whistle has a small hole
  • A flashlight has a curved mirror behind the bulb
  • A.It throws the light forward in a beam
  • B.It can vibrate and make a sound
  • C.It bounces light back in a straight beam
  • D.Air rushing through it makes a high sound
2.Draw a line from each one to its match.
  • A guitar has a hollow body
  • A lampshade is open at the bottom
  • A blind is made of thick slats
  • A megaphone is a cone
  • A.The sound is made louder inside it
  • B.It sends the sound in one direction
  • C.It blocks the light from the window
  • D.It sends light down onto the table

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

Answer key — Built That Way for a Reason

Set 1. Prints on its own sheet.

  1. 1.1. A drum has a stretched skin — B (It can vibrate and make a sound) 2. A mirror is flat and smooth — C (It bounces light back in a straight beam) 3. A whistle has a small hole — D (Air rushing through it makes a high sound) 4. A flashlight has a curved mirror behind the bulb — A (It throws the light forward in a beam)
  2. 2.1. A guitar has a hollow body — A (The sound is made louder inside it) 2. A lampshade is open at the bottom — D (It sends light down onto the table) 3. A blind is made of thick slats — C (It blocks the light from the window) 4. A megaphone is a cone — B (It sends the sound in one direction)

Questions about Built That Way for a Reason

What does the Built That Way for a Reason worksheet cover?

It practices how the shape of an object helps it work — 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 the job it does”, and the answer key follows on the next sheet.

Which NGSS performance expectation does Built That Way for a Reason 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?

Built That Way for a Reason 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 Built That Way for a Reason 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 Built That Way for a Reason 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 Built That Way for a Reason free to print and photocopy?

Yes. Built That Way for a Reason, 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 — “Built That Way for a Reason” 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. Built That Way for a Reason 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? Built That Way for a Reason 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.