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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 24 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 seed looks like a tiny stone. How could you find out if it is alive?
  • A.Paint it
  • B.Shake it
  • C.Plant it, water it and see if it grows
2.A daisy stays in one place all its life. Is it alive?
  • A.No, because it stays still
  • B.No, because it is small
  • C.Yes, it needs water, air and light, and it grows
3.A kitten drinks, eats and grows bigger. What does that tell you?
  • A.It is not alive
  • B.It is alive
  • C.It is a toy
4.A rock has been in the yard for a hundred years. Is it alive?
  • A.Yes, because it is old
  • B.No, it needs nothing and it does not grow
  • C.Yes, because it is in the yard
5.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
6.What do all living things need?
  • A.Toys
  • B.Shoes
  • C.Water and air
7.A ladybird lays eggs that hatch into baby ladybirds. What does that show?
  • A.Eggs never hatch
  • B.Living things make young like themselves
  • C.Ladybirds are toys
8.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

LessonPrint · K-LS1-1 · Set 24 · free to copy for classroom use

Answer key — How Do We Know It Is Alive?

Set 24. Prints on its own sheet.

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

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