Metamorphosis worksheet with answer key

Learning goals

• Students can compare complete and incomplete insect metamorphosis.
• Students can explain tadpole-to-frog development separately from insect life cycles.
• Students can build a source-based diagram and explain its limits.

Short reading

Metamorphosis is a change in body form during an animal’s development. In insects, complete metamorphosis includes a pupa stage, while incomplete metamorphosis does not. Frogs undergo amphibian metamorphosis and do not become pupae.

• A life cycle connects young stages, adulthood and the next generation.
• Butterflies and mosquitoes develop through eggs, larvae, pupae and adults.
• Dragonflies have no pupa stage despite moving from aquatic to aerial life.
• A tadpole is a frog larva, not an insect larva.
• The number of pictures in a diagram does not define the metamorphosis type.
• In Indonesian, a butterfly pupa is commonly called a kepompong, and the adult insect after metamorphosis is the imago.

Activity 1

Write the next stage or developmental pattern requested in each row, using the lesson diagrams.

Activity 2

1. What is the key evidence of complete insect metamorphosis?
2. Why discuss frogs separately?
3. Why might two diagrams have different picture counts?
4. Explain incomplete.
5. What should you write if a picture’s identity is uncertain?

Reflection

Which evidence helped you distinguish dragonflies from butterflies?

Write one feature you still want to check in a frog diagram.