Crossword - Practice for Layers and Rocks Test

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Across
  1. 4. a layer of hotter rock located below the Earth's crust; the rock here contains more magnesium and iron
  2. 7. refers to a type of metamorphic rock that forms strips or layers of colors within the rock
  3. 9. a type of rock that forms from magma or lava that cools and hardens
  4. 11. circular flow of a gooey mixture of rocks and magma in the mantle caused by that mixture being heated by the core of the Earth
  5. 14. a layer of molten iron and nickel that surrounds the inner core of Earth
  6. 15. a naturally occurring, inorganic solid that has a crystal structure and a definite chemical composition
  7. 16. a wave of energy that travels through the Earth, away from an earthquake in all directions
  8. 18. a dense sphere of solid iron and nickel at the center of Earth
  9. 20. a type of rock that forms from lava that cools or hardens on or near earth's surface
  10. 21. the process by which atoms are arranged to form a material with a crystal structure
  11. 22. a type of rock that forms when particles from other rocks or the remains of plants and animals are pressed and cemented together
Down
  1. 1. a type of rock that forms from an existing rock that is changed by heat, pressure, or chemical reactions
  2. 2. a sudden and violent shaking of the ground caused by the cracking, shifting, and moving of the earth's crust
  3. 3. small, solid pieces of material that come from rocks or living things
  4. 5. a series of processes on the surface and inside Earth that slowly changes rocks from one kind to another
  5. 6. a mountain or hill having an opening that blasts out magma (lava), rocks, and gas from the earth's crust
  6. 8. a solid in which the atoms are arranged in a pattern that repeats again and again
  7. 10. a pure substance made of only one kind of atom; also the smallest, most basic part of something
  8. 12. a type of rock that forms from magma that cools or hardens underground
  9. 13. a process of heat transfer where the warm part of a fluid rises and the cool part of that fluid sinks
  10. 17. below the surface of the earth; underground
  11. 19. a layer of solid rock that forms Earth's outer surface; the main elements in the rock are oxygen and silicon