Across
- 1. Ancient Greek mathematician famous for a right-angled triangle theorem
- 4. Cold, treeless biome with frozen subsoil
- 6. Force caused by electric currents and magnetic fields
- 9. Wearing away of earth’s surface by wind or water
- 10. Horizontal lines used to measure distance north or south of the equator
- 11. Vertical lines used to measure position east or west
- 12. Process by which plants convert sunlight into energy
- 13. Imaginary line dividing the Earth into Northern and Southern Hemispheres
- 14. The basic unit of a chemical element
Down
- 2. One complete orbit around the sun or a political uprising
- 3. Nerve cell that transmits impulses
- 5. Period of revival in art and learning in Europe from the 14th century
- 6. Organelle known as the powerhouse of the cell
- 7. Formal agreement between nations
- 8. Branch of mathematics dealing with symbols and equations