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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 3 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.Which of these can grow and have young?
  • A.A teddy bear
  • B.A rock
  • C.A rabbit
2.How is a real fish different from a toy fish?
  • A.The real fish is shinier
  • B.The real fish needs water, food and air to stay alive
  • C.The toy fish is bigger
3.A tree grows new leaves every spring. What does that show?
  • A.It is a building
  • B.It is not alive
  • C.It is alive and growing
4.What do all living things need?
  • A.Shoes
  • B.Toys
  • C.Water and air
5.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
6.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
7.A cloud moves across the sky and changes shape. Is it alive?
  • A.Yes, because it changes shape
  • B.No, it does not eat, breathe or have young
  • 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 in the yard
  • B.No, it needs nothing and it does not grow
  • C.Yes, because it is old

LessonPrint · K-LS1-1 · Set 3 · free to copy for classroom use

Answer key — How Do We Know It Is Alive?

Set 3. Prints on its own sheet.

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