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The Universe Worksheet | KS3 Physics and Astronomy

This engaging and informative worksheet introduces Key Stage 3 students to the structure and scale of the Universe, combining planetary science, gravitational forces, and astronomical concepts in a 45-minute activity. It is ideal for classroom use, homework, or revision and supports calculator use for relevant numerical questions.

The worksheet covers the Solar System, moons, galaxies, and the Milky Way, as well as the difference between rocky and gas planets. Students apply knowledge of gravitational force using the formula F=mg, calculate weight on different planets, and interpret how gravity changes with mass and distance. Additional questions explore the concept of light years, Earth’s orbit, seasons, and key celestial events like solstices and equinoxes.

This resource builds confidence in both conceptual understanding and scientific reasoning. A full answer sheet is included, making it suitable for self-marking, guided correction, or homework review. It aligns well with the KS3 science curriculum and lays foundational knowledge for future GCSE studies in physics and astronomy.

Key learning areas include planetary order and classification, gravitational strength, light year calculations, orbital dynamics, seasonal changes, and basic cosmology.