8th Grade Science Worksheets
Ages 13-14 · 11 topics · 170 worksheets
8th grade science worksheets (170) for ages 13-14: atoms, chemical changes, heredity, natural selection, energy and forces, all with answer keys.
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Grade: 8th Grade
Subject: Science
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Popular 8th grade science worksheets
170 worksheets· showing the 20 most popular · use Topic to see them all
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About these worksheets
8th grade science worksheets on ClassWeekly are 170 printable sheets for ages 13-14 across 11 topics, each with an answer key. They cover atoms, the periodic table and chemical changes, heredity and natural selection, energy, forces and motion, waves, Earth systems, ecosystems, space, the scientific method and engineering design.
8th grade science asks students to use models and evidence: atoms rearranging in a reaction, genes passing traits from parents to offspring, and forces changing an object's motion.
This page collects all 170 science worksheets for 8th grade. Matter is the largest topic with 44 sheets on atoms and molecules, the periodic table, physical and chemical changes, and properties of matter. Living Things has 34 on heredity, natural selection, reproduction and cells. Energy and Scientific Method have 15 each, Earth Systems 12, Ecosystems and Earth Science 11 each, Forces and Motion 10, Waves and Light and Earth and Space 7 each, and Engineering and Design 4.
Every sheet has an answer key. 109 sheets carry a middle school NGSS performance expectation. The others practice a skill or fact that no single expectation names, so they carry none.
Last reviewed: November 2026