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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 19 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 cloud moves across the sky and changes shape. Is it alive?
  • A.No, it does not eat, breathe or have young
  • B.Yes, because it changes shape
  • C.Yes, because it moves
3.A tree grows new leaves every spring. What does that show?
  • A.It is alive and growing
  • B.It is a building
  • C.It is not alive
4.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
5.Which of these can grow and have young?
  • A.A teddy bear
  • B.A rock
  • C.A rabbit
6.A ladybird lays eggs that hatch into baby ladybirds. What does that show?
  • A.Living things make young like themselves
  • B.Eggs never hatch
  • C.Ladybirds are toys
7.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
8.What do all living things need?
  • A.Water and air
  • B.Shoes
  • C.Toys

LessonPrint · K-LS1-1 · Set 19 · free to copy for classroom use

Answer key — How Do We Know It Is Alive?

Set 19. Prints on its own sheet.

  1. 1.It is alive
  2. 2.No, it does not eat, breathe or have young
  3. 3.It is alive and growing
  4. 4.Plant it, water it and see if it grows
  5. 5.A rabbit
  6. 6.Living things make young like themselves
  7. 7.The real fish needs water, food and air to stay alive
  8. 8.Water and air

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