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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 21 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 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 moves
  • C.Yes, because it makes a noise
2.A rock has been in the yard for a hundred years. Is it alive?
  • A.No, it needs nothing and it does not grow
  • B.Yes, because it is old
  • C.Yes, because it is in the yard
3.What do all living things need?
  • A.Shoes
  • B.Toys
  • C.Water and air
4.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
5.A daisy stays in one place all its life. Is it alive?
  • A.No, because it is small
  • B.No, because it stays still
  • C.Yes, it needs water, air and light, and it grows
6.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
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 real fish is shinier
  • C.The toy fish is bigger
8.Which of these can grow and have young?
  • A.A rabbit
  • B.A teddy bear
  • C.A rock

LessonPrint · K-LS1-1 · Set 21 · free to copy for classroom use

Answer key — How Do We Know It Is Alive?

Set 21. Prints on its own sheet.

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

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