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How Do We Know It Is Alive? is a free printable Kindergarten science worksheet on using needs, growth and young as evidence that something is alive, aligned to NGSS performance expectation K-LS1-1. It prints 8 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 2 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.

How Do We Know It Is Alive?

K-LS1-1

NameDate

Circle the best answer.

1.How is a real fish different from a toy fish?
  • A.The real fish is shinier
  • B.The toy fish is bigger
  • C.The real fish needs water, food and air to stay alive
2.A cloud moves across the sky and changes shape. Is it alive?
  • A.Yes, because it changes shape
  • B.No, it does not eat, breathe or have young
  • C.Yes, because it moves
3.A kitten drinks, eats and grows bigger. What does that tell you?
  • A.It is not alive
  • B.It is a toy
  • C.It is alive
4.A tree grows new leaves every spring. What does that show?
  • A.It is a building
  • B.It is alive and growing
  • C.It is not alive
5.A toy robot moves and beeps. Is it alive?
  • A.Yes, because it moves
  • B.Yes, because it makes a noise
  • C.No, it does not need food, water or air, and it cannot grow
6.A daisy stays in one place all its life. Is it alive?
  • A.Yes, it needs water, air and light, and it grows
  • B.No, because it stays still
  • C.No, because it is small
7.A seed looks like a tiny stone. How could you find out if it is alive?
  • A.Paint it
  • B.Shake it
  • C.Plant it, water it and see if it grows
8.Which of these can grow and have young?
  • A.A teddy bear
  • B.A rabbit
  • C.A rock

LessonPrint · K-LS1-1 · Set 2 · free to copy for classroom use

Answer key — How Do We Know It Is Alive?

Set 2. Prints on its own sheet.

  1. 1.The real fish needs water, food and air to stay alive
  2. 2.No, it does not eat, breathe or have young
  3. 3.It is alive
  4. 4.It is alive and growing
  5. 5.No, it does not need food, water or air, and it cannot grow
  6. 6.Yes, it needs water, air and light, and it grows
  7. 7.Plant it, water it and see if it grows
  8. 8.A rabbit

Last reviewed 2026-09-05. Aligned to K-LS1-1 of the Next Generation Science Standards.