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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. What stage comes after the caterpillar?
  2. 2. What does this record not tell you?
  3. 3. What stage comes after the tadpole with legs?
  4. 4. What do both life cycles have in common?
2.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
3.Which four things do all life cycles share?
  • A.Eggs, wings, legs and tails
  • B.Flowers, seeds, fruit and leaves
  • C.Birth, growth, reproduction and death
4.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
5.What do the life cycles of a chicken, a frog and a fish all have in common?
  • A.Each has a chrysalis
  • B.Each begins as an egg, grows, and makes young of its own
  • C.Each is born alive
6.Why is a life cycle called a cycle?
  • A.It happens on a bicycle
  • B.Every stage is round
  • C.The adult makes young, and they go through the same stages again
7.A kitten is born alive rather than hatching from an egg. Does it still have a life cycle?
  • A.Yes: birth, growth, reproduction and death
  • B.No, cats do not grow
  • C.No, only animals from eggs have one

LessonPrint · 3-LS1-1 · Set 9 · free to copy for classroom use

Answer key — Caterpillars and Frogspawn

Set 9. Prints on its own sheet.

  1. 1.1. The chrysalis. 2. It does not tell you how long each stage lasted. 3. The froglet. 4. Both begin as eggs, grow, produce eggs of their own, and end in death.
  2. 2.It is changing into a frog
  3. 3.Birth, growth, reproduction and death
  4. 4.The young frog lives in water and changes shape before it lives on land
  5. 5.Each begins as an egg, grows, and makes young of its own
  6. 6.The adult makes young, and they go through the same stages again
  7. 7.Yes: birth, growth, reproduction and death

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