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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 4 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 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
2.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
3.A seed looks like a tiny stone. How could you find out if it is alive?
  • A.Plant it, water it and see if it grows
  • B.Paint it
  • C.Shake it
4.Which of these can grow and have young?
  • A.A rock
  • B.A rabbit
  • C.A teddy bear
5.A toy robot moves and beeps. Is it alive?
  • A.Yes, because it moves
  • B.No, it does not need food, water or air, and it cannot grow
  • C.Yes, because it makes a noise
6.A kitten drinks, eats and grows bigger. What does that tell you?
  • A.It is a toy
  • B.It is alive
  • C.It is not alive
7.A rock has been in the yard for a hundred years. Is it alive?
  • A.Yes, because it is in the yard
  • B.No, it needs nothing and it does not grow
  • C.Yes, because it is old
8.What do all living things need?
  • A.Shoes
  • B.Toys
  • C.Water and air

LessonPrint · K-LS1-1 · Set 4 · free to copy for classroom use

Answer key — How Do We Know It Is Alive?

Set 4. Prints on its own sheet.

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

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