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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 5 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.What do all living things need?
  • A.Water and air
  • B.Toys
  • C.Shoes
2.A toy robot moves and beeps. Is it alive?
  • A.Yes, because it makes a noise
  • B.No, it does not need food, water or air, and it cannot grow
  • C.Yes, because it moves
3.How is a real fish different from a toy fish?
  • A.The toy fish is bigger
  • B.The real fish is shinier
  • C.The real fish needs water, food and air to stay alive
4.A seed looks like a tiny stone. How could you find out if it is alive?
  • A.Shake it
  • B.Paint it
  • C.Plant it, water it and see if it grows
5.Which of these can grow and have young?
  • A.A rabbit
  • B.A rock
  • C.A teddy bear
6.A cloud moves across the sky and changes shape. Is it alive?
  • A.Yes, because it moves
  • B.No, it does not eat, breathe or have young
  • C.Yes, because it changes shape
7.A ladybird lays eggs that hatch into baby ladybirds. What does that show?
  • A.Ladybirds are toys
  • B.Living things make young like themselves
  • C.Eggs never hatch
8.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

LessonPrint · K-LS1-1 · Set 5 · free to copy for classroom use

Answer key — How Do We Know It Is Alive?

Set 5. Prints on its own sheet.

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

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