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