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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 20 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.A kitten drinks, eats and grows bigger. What does that tell you?
  • A.It is alive
  • B.It is not alive
  • C.It is a toy
2.A seed looks like a tiny stone. How could you find out if it is alive?
  • A.Paint it
  • B.Plant it, water it and see if it grows
  • C.Shake it
3.A cloud moves across the sky and changes shape. Is it alive?
  • A.Yes, because it changes shape
  • B.Yes, because it moves
  • C.No, it does not eat, breathe or have young
4.A ladybird lays eggs that hatch into baby ladybirds. What does that show?
  • A.Living things make young like themselves
  • B.Ladybirds are toys
  • C.Eggs never hatch
5.How is a real fish different from a toy fish?
  • A.The real fish needs water, food and air to stay alive
  • B.The toy fish is bigger
  • C.The real fish is shinier
6.A daisy stays in one place all its life. Is it alive?
  • A.No, because it stays still
  • B.Yes, it needs water, air and light, and it grows
  • C.No, because it is small
7.A toy robot moves and beeps. Is it alive?
  • A.No, it does not need food, water or air, and it cannot grow
  • B.Yes, because it makes a noise
  • C.Yes, because it moves
8.A rock has been in the yard for a hundred years. Is it alive?
  • A.Yes, because it is old
  • B.No, it needs nothing and it does not grow
  • C.Yes, because it is in the yard

LessonPrint · K-LS1-1 · Set 20 · free to copy for classroom use

Answer key — How Do We Know It Is Alive?

Set 20. Prints on its own sheet.

  1. 1.It is alive
  2. 2.Plant it, water it and see if it grows
  3. 3.No, it does not eat, breathe or have young
  4. 4.Living things make young like themselves
  5. 5.The real fish needs water, food and air to stay alive
  6. 6.Yes, it needs water, air and light, and it grows
  7. 7.No, it does not need food, water or air, and it cannot grow
  8. 8.No, it needs nothing and it does not grow

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