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Across 2. a cavity made by the imprint of an organism or its tracks 4. rock formed by lava that cooling on the surface of the earth 6. shell of rock around the surface 7. hot molten rock that flows onto the Earth’s surface 8. type of rock formed by the slow accumulation of small fragments of rock 10. pure, naturally occurring solid material made up of a combination of 2 or more elements 11. rock formed from magma that cooled and hardened below the surface 12. the thickest layer of the Earth 15. vibrations spreading out from the earthquakes focus 18. a visual record of earthquake vibrations 24. - an instrument for measuring earthquake vibrations 25. horizontal layers of rock caused by the slow accumulation of sediments 26. bending and tilting of sedimentary rock layers 27. type of rock formed by the cooling of molten rock 28. An exact date that can be given in years 29. Ten minerals ranked in order of hardness against when all minerals are compared

Down 1. A general rule that determines the relative age of sedimentary rock 2. a type of rock formed below the Earth’s surface when a rock is altered 3. Pure substance that cannot be broken down into other substances 4. the point on the Earth’s surface above the focus, from which earthquakes originates 5. the break in the Earth’s crust along which rock moves 9. - the opening in a volcano where the lava flows through 13. hot molten rock found at great depths below the Earth’s surface 14. a rock that looks exactly like the original shell, bone or piece of wood 16. the point underground where the energy is first released to cause an earthquake 17. The age of someone or something compared with the age of someone or something else 19. measures the magnitude of an earthquke 20. combination of two or more minerals in various protection 21. type of fossil made when sediment slowly fills a mould 22. people who study the Earth 23. the remains and traces of prehistoric organisms