Free Printable 3rd Grade Biology Activities

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La Célula Word Search

Spanish cell biology word search for Grades 3–5. Find 8 hidden words including ADN, núcleo, and mitocondria in a circle-shaped grid.

Bacteria and Decomposers

Printable science worksheet on bacteria: students read about decomposers, record facts about size and habitat, and learn how bacteria break down waste.

Decomposers and Ecosystems

Printable science worksheet on decomposers and their role in breaking down waste and enriching soil. Includes a reading passage, short-answer questions, and true-or-false statements.

Cells Word Search

Cell biology word search for Grades 3–5. Find 6 hidden words: cell, cytoplasm, nucleus, mitochondria, organism, and lysosome.

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Seedless Fruits and Plant Mutations

Printable science worksheet on plant mutations and seedless fruits, with fill-in-the-blank questions and vocabulary about mutations and sterile plants.

Heredity and Traits Unit Review

Printable science unit review with five multiple-choice questions on heredity, traits, and how offspring inherit characteristics from parents.

How Kittens Inherit Traits From Parents

Elementary science worksheet about heredity and inherited traits using kittens as an example. Students identify which parent traits the kitten inherited.

Inherited Traits and Animal Offspring

Printable science worksheet on heredity and traits using a cat family picture: students observe and answer yes/no questions about inherited characteristics.

Habitat Changes and Extinction

Printable 3rd grade science worksheet on habitat changes and extinction, covering species extinction, dinosaurs, mass extinction, and endangered species.

Species and Varieties

Printable elementary science worksheet on species and varieties with multiple-choice and fill-in-the-blank vocabulary practice using apple and orange trees.

Life Cycle Unit Vocabulary

Printable 3rd grade science vocabulary worksheet: matching activity with 11 life-cycle terms including organism, metamorphosis, germinate, and life cycle.

Butterfly Life Cycle

Printable science worksheet on the butterfly life cycle: fill-in-the-blank activity with vocabulary words egg, caterpillar, chrysalis, and butterfly, plus a drawing prompt.

Week 6 Review: Science and Math

Printable Week 6 review worksheet for Grades 3–4 covering living things, environments, rounding, time, and word problems.

Science Vocabulary 1 Word Search

Science vocabulary word search for Grades 3–5. Find 40 hidden words on plant biology and sound, including anther, pollination, decibel, and amplifier, in a circle-shaped grid.

Fungi and Mushrooms: True or False

Printable science worksheet for Grades 3–6 with 20 true-or-false questions on fungi, mushrooms, decomposition, antibiotics, and hallucinogenic effects.