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Across 1. rock that has tiny holes or pores that liquids can pass through 7. A mineral that is difficult to scratch with a file and cannot e scratched with a steel knife 9. The second most plentiful element in our world 13. another name for a "side" of a crystal 14. over the winter __________ expands and breaks apart rocks 15. known as volcanic glass 16. A naturally formed geometric shape containing "sides" or "faces" 19. one of the minerals found in granite 20. makes up part of the continental crust and the ocean floors, contains augite and olivine 23. the name given to the way rocks are changing from one to another 24. some rocks, like sedsedimentary rocks, form with lines called _________. 30. Chemical combinatgions of two or more elements 31. rocks formed by materal that settles to the bottom of bodies of water 32. water leaving the surface and entering the atmosphere (air) 33. Compound of iron and sulfur 34. a sedimentary rock formed from pieces of clay settling to the bottom of a body of water 36. a rock formed from the remains of living things ... calcite sediment forms this rock 37. one of the terms used to describe "luster" 38. they float on the mantle and cary continents and ocean floor

Down 2. This compound contains useful amounts of metals 3. The most plentiful element in our world 4. color a mineral leaves when the mineral is rubbed on a white plate 5. can cary rocks long distances 6. melted rock found beneath the earth's surface 8. forms cube-shaped crystals 9. The hardness of a mineral is found by doing this test 10. rocks formed one of two ways, from molten magma or from red-hot lava 11. formed like gabbro and made up of quarts, mica, and feldspar 12. one of the things needed to make metamorphic rock 13. refers to breaking without cleavage 17. a rock formed by pieces of sand settling to the bottom of a body of water 18. Made up of only one kind of atom 21. one of the minerals found in granite 22. a rock formed from another rock under heat and pressure 25. The tendency of a mineral to split along straight surfaces, or planes 26. Also known as "characteristics" 27. this is crude oil 28. a volcanic rock that floats on water 29. A solid natural substance that does not come from anyuthing living 35. a rock that is formed from the remains of living things ... from ancient plants