Across
- 1. when the number of humans grows beyond what the available resources can support
- 8. this type of stress occurs at transform boundaries
- 13. the force that acts on rocks and changes its shape or volume.
- 15. magma that has reached Earth's surface
- 19. the pattern of growth where the larger a population gets, the faster it grows
- 22. the farther you are from the mid ocean ridge, the _____ the rock gets
- 24. the practice of using resources in ways that maintains at a certain quality for a certain period of time
- 26. mass ___________ mark when one era ends and another begins
- 27. an unforseen chain of events caused by a disturbance in a system
- 29. this type of boundary sees two plates moving away from each other
- 31. the long chain of volcanoes that line the pacific ocean
- 32. the name given to a sleeping volcano
- 33. zipper-like chain of undersea mountains
- 34. a wave or series of waves produced by an earthquake or landslide
- 36. something that restricts or slows down the growth of a populaiton
- 37. the geologic time scale is divided into the precambrian time and three major ____
- 40. the name given to a volcano that is currently erupting or shows signs of erupting soon
- 41. the Earth is about 4.6 _______ years old
- 43. the process by which ocean floor sinks under less dense crust
- 45. the age of a rock given as the number of years since it formed
- 48. the number of births per 1000 individuals over a given time
- 49. the name for the supercontinent that broke apart almost 200 million years ago
- 50. a break in the rock in Earth's crust or mantle
- 51. this type of boundary see two plates moving towards each other
- 52. a gap in the geologic record due to erosion
Down
- 2. undersea valleys that are the deepest parts of the ocean floor
- 3. this greenhouse gas has contributed the most to global warming
- 4. this mountain range was created through the collision of the indian plate with the eurasian plate
- 5. this movement in the mantle drives the process of plate tectonics
- 6. to use less of a resource so that it can last longer
- 7. the name given to a volcano when it has died and will never erupt again
- 9. the age of a rock compared to the rocks around it
- 10. subdivisions of eras
- 11. this type of stress occurs at convergent boundaries
- 12. the shaking that results from the movement of Earth's plates
- 14. the law of _____________ states that in undisturbed sedimentary rock layers, the oldest rocks are at the bottom and the youngest are at the top
- 16. clean energy sources that do not come from fossil fuels
- 17. molten mixture of rock forming substances, gases and water from the mantle
- 18. Aflred Wegener believed the continents used to fit together like ______ pieces
- 20. the number of deaths per 1000 individuals over a given time
- 21. the remains or traces of living things
- 23. an area where lava frequently erupts at the surface away from any plate boundary
- 25. the record of major geologic events and the evolution of life on Earth
- 28. the method used to determine the absolute age of rocks
- 30. true or false: the geologic time scale is constantly being updated and refined
- 34. this type of stress occurs at divergent boundaries
- 35. the area under a volcano where magma collects
- 38. when atoms of one element break down to form atoms of another element
- 39. this was the name of the man responsible for the theory of continental drift
- 42. this gas comes largely from cows and is many times worse than carbon dioxide as a greenhouse gas
- 44. this type of boundary see two plates sliding past one another
- 46. a structure that forms on Earth's surface when magma reaches the surface
- 47. the contamination of Earth's land, air and water