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Caterpillars and Frogspawn is a free printable Grade 3 science worksheet on using eight weeks of observations to compare two animal life cycles, aligned to NGSS performance expectation 3-LS1-1. It prints 7 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.

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Caterpillars and Frogspawn

3-LS1-1

NameDate

Read the record, then answer the questions.

1.Read the record, then answer the questions.

Two Life Cycles Watched

Observations the class kept of caterpillars and frogspawn over eight weeks. WHAT WE WATCHED Butterfly: egg, caterpillar, chrysalis, adult, eggs again Frog: egg, tadpole, tadpole with legs, froglet, adult, eggs again Both started as eggs. Both grew, then produced eggs of their own. Neither adult lived past the end of the year.

  1. 1. Why are the two cycles different in the middle?
  2. 2. What stage comes after the tadpole with legs?
  3. 3. What do both life cycles have in common?
  4. 4. What stage comes after the caterpillar?
2.How is a frog's life cycle different from a chicken's?
  • A.The chicken changes shape completely
  • B.The frog has no eggs
  • C.The young frog lives in water and changes shape before it lives on land
3.A tadpole grows back legs, then front legs, and loses its tail. What is happening?
  • A.It is changing into a frog
  • B.It is dying
  • C.It is turning into a fish
4.What do the life cycles of a chicken, a frog and a fish all have in common?
  • A.Each begins as an egg, grows, and makes young of its own
  • B.Each is born alive
  • C.Each has a chrysalis
5.Why is a life cycle called a cycle?
  • A.The adult makes young, and they go through the same stages again
  • B.It happens on a bicycle
  • C.Every stage is round
6.What is the right order for a frog's life cycle?
  • A.Tadpole, frogspawn, adult frog, froglet
  • B.Froglet, tadpole, frogspawn, adult frog
  • C.Frogspawn, tadpole, froglet, adult frog
7.What is the right order for a chicken's life cycle?
  • A.Egg, chick, young hen, adult hen
  • B.Chick, egg, adult hen, young hen
  • C.Adult hen, chick, egg, young hen

LessonPrint · 3-LS1-1 · Set 22 · free to copy for classroom use

Answer key — Caterpillars and Frogspawn

Set 22. Prints on its own sheet.

  1. 1.1. Different organisms have different stages between birth and adult. 2. The froglet. 3. Both begin as eggs, grow, produce eggs of their own, and end in death. 4. The chrysalis.
  2. 2.The young frog lives in water and changes shape before it lives on land
  3. 3.It is changing into a frog
  4. 4.Each begins as an egg, grows, and makes young of its own
  5. 5.The adult makes young, and they go through the same stages again
  6. 6.Frogspawn, tadpole, froglet, adult frog
  7. 7.Egg, chick, young hen, adult hen

Last reviewed 2026-09-05. Aligned to 3-LS1-1 of the Next Generation Science Standards.