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Life Cycles
© Eric Isselee/123RF

Life Cycles

All living things go through changes as they grow and develop. Although individual organisms die, new ones replace them, ensuring the survival of the species. During its life cycle, an organism goes through physical changes that allow it to reach adulthood and produce new organisms. Since these changes are common within a species, they can be grouped into stages of development. The unit Life Cycles addresses the life cycles of plants and animals, including humans.

Process Activities

Human Life Cycle Sequence

Life Cycles of Edible Plants

Mealworm Life Cycles


Supporting Materials

Show Me Only
Additional Reading
Comprehension Support

Science Videos

Bees' Disease
Comparing Life Cycles
Moms Who Listen

Career Files

Fish Hatchery Worker; Dog Breeder; Seed Farmer

Reading A-Z Books

The Mighty Saguaro Cactus - Level U

Retelling Rubrics

Nonfiction Retelling Rubric

Science Diagrams

Life Cycle of a Butterfly
Life Cycle of a Frog

Vocabulary Cards

Life Cycles

Word Work

Crossword; Word Search; Matching

Book Assembly