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3rd Grade · Science

3rd Grade Science Worksheets

In the upper elementary grades, science becomes more systematic. Children plan fair tests that change one thing at a time, measure, and explain results with evidence. Topics span forces and motion, energy, life cycles and ecosystems, rocks, water and weather, and the solar system, with models and diagrams for what can't be seen directly. Third grade science covers forces and magnets, life cycles, inherited traits, and weather and climate. Download any of these third grade science worksheets free as a PDF, at easy, medium and hard levels, many with an answer key for grown-ups.

  • 10 worksheets
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3rd Grade Science Games

Print 3rd grade science worksheets

10 worksheets

Label the human skeleton: tricky word bank Science · 2–3 · Worksheet · 1 page Medium Free Answer key Solid or liquid? Science · 2–3 · Cut and sort · 2 pages Medium Free Answer key Fossils and Earth's past: fill in the blanks Science · Grade 3 · Reading · 1 page Easy Free Answer key Label the phases of the Moon Science · Grade 3 · Worksheet · 1 page Easy Free Answer key Mystery woodland picture join the dots: count by 5s to 180 Science · Grade 3 · Join the dots · 1 page Easy Free Answer key Label the parts of a tree: tricky word bank Science · Grade 3 · Worksheet · 1 page Medium Free Answer key The great paper towel test Science · Grade 3 · Reading · 2 pages Medium Free Answer key Animal adaptations crossword Science · Grade 3 · Puzzle · 1 page Hard Free Answer key Engineering design word search: 12 words Science · Grade 3 · Puzzle · 1 page Hard Free Answer key Pigpen code: human body systems Science · Grade 3 · Puzzle · 1 page Hard Free Answer key

3rd grade science games to play online

3rd Grade Science Games
  • 90 free levels

    English

    Memory Lanterns

    Flip glowing lanterns to find pairs that belong together.

    PS–8 216 levels · 9 tracks
  • 40 free levels

    English

    Word Woods

    Hunt for hidden words on the woodland signboard, and learn a fact with every find.

    K–5 96 levels · 4 tracks
  • 20 free levels

    Logic & Puzzles

    Mirror Maze

    Bend a beam of light with mirrors to light up every crystal — in the right order.

    3–8 48 levels · 2 tracks
  • 3D 10 free levels

    Science

    Marble Mountain

    Lay straights, curves, drops and splitters to roll marbles down the mountain.

    2–6 48 levels · 2 tracks
  • 3D 10 free levels

    Science

    Bridge Lab

    Build a bridge from beams, brace it with triangles, and stay on budget.

    3–8 48 levels · 2 tracks
  • 3D 10 free levels

    Science

    Circuit Workshop 3D

    Wire up batteries, bulbs and switches on a 3D workbench.

    3–8 48 levels · 2 tracks
  • 3D 10 free levels

    Science

    Habitat Builder 3D

    Find the right home for frogs, camels, polar bears and more.

    K–5 48 levels · 2 tracks
  • 20 free levels

    Geography

    Landform Explorer

    Mountains, valleys, peninsulas and deltas — learn the shapes of the land and find them on Earth.

    1–6 48 levels · 2 tracks

3rd grade science courses in the Academy

All 3rd grade science courses

Everything for 3rd Grade All science games 3rd Grade courses

Guide for grown-ups