Earth Science Vocabulary

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Across
  1. 2. - a structure build across the river to control its flow
  2. 5. -melted rock inside the earth
  3. 7. - an opening in the Earths crust through which molten lava, ash,and gases are ejected
  4. 9. -the breaking down or wearing of landforms
  5. 13. - a type of weathering the changes rocks into one or more new substances
  6. 16. -a deposit of sediment that builds up river's mouth
  7. 17. - a deposit of sediment deposited by a river when it leaves the mountains
  8. 18. - a structure built at right angles to the beach to control beach erosion
  9. 20. - a sudden movement of the earth's crust
  10. 22. - the building up of land or the creation of land forms
  11. 24. - a small ridge or raised area of land used to prevent a body of water from overflowing
  12. 26. -a large mass of ice and snow that moves over land leaving distinctive features on the earth surface
  13. 28. - a series of large sea waves caused by an underwater earthquake or a volcanic eruption
  14. 29. -a mound of sand piled up by wind
  15. 30. -the layer of the earth beneath the crust. It is believed to be slightly molten and solid rock
Down
  1. 1. world's longest mountain range;Iceland is part of range
  2. 3. of fire -a zone of volcanic and seismic activity; it directly borders the Pacific ocean
  3. 4. - device that can record the vibrations in the earth
  4. 6. - moisture that falls to the earth after being mixed with wastes from burned fossil fuels
  5. 8. - a type of weathering that breaks rocks into smaller pieces without changing it chemically; also known as physical weathering
  6. 10. -deep canyon in the ocean floor
  7. 11. -layer of the earth beneath the mantle. It is believed to be made up of iron and nickel
  8. 12. - a scientific thearym that the continents were once joined together in one big supercontinent and then slowly drifted a part
  9. 13. -the rocky surface that makes up the top of the lithosphere and includes the continents and the ocean floor
  10. 14. -the movement of weathered rock from place to place
  11. 15. - Continent-sized slabs that move slowly across the earth surface on a thin layer of partially melted mantle
  12. 19. -the dropping of sediment particles by water wind or ice
  13. 21. - a crack in the rock of the Earth's crust (where most earthquake occur)
  14. 23. - system of drains that prevents flooding during rainstorms
  15. 25. - melted rock that reaches the earths surface
  16. 27. - sand ,silt, gravel, and other small particles