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Across 4. He worked on electromagnetism and AC current, he played a key role in he develpment of modern electricity. 5. Creator of one of the first modern telescopes he proved the Earth orbitted the Sun. 7. Discovered radiation and helped to apply it to the fireld of X-ray. 13. This Knight explained the law of gravity and also made contributions to mathematics, optics and physics. 14. Responsible for the general theory of relativity he won a Nobel Prize in Physics. 15. A great early Greek scientist who researched the natural sciences. 16. This Russian hemist formulated the Periodic Law and standardised the Periodic Table of Elements we use today. 17. Concerned with the study of plants and animals.

Down 1. The science of materials, chemicals and chemical reactions. 2. The study of rocks, the Earth, volcanoes and earthquakes. 3. His theory of evolution and the Origin of Species was very radical for the time. 6. The Scottish biologist who discovered penicillin. 8. This involves a study of the stars and planets. 9. The science of how living things affect each other and the environment in which they live. 10. A German chemist who discovered nuclear fission. 11. The science of forces and energy. 12. Contributed to medical science and invented a process makikng milk safer.