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Across 4. a substance, such as coal, petroleum, or natural gas, formed over millions of years from the remains of organisms and used today as an energy source 11. a resource that can be replaced in a short time 12. silt, or soil, good for plant growth because it absorbs water 14. any form of water that falls from the clouds to Earth 15. the third planet from the sun 16. a natural satelite of planets 17. the process by which water is renewed an dused over and over again on the Earth 20. the imaginary line on which the Earth is tilted and rotates 21. a process that breaks down rocks 23. the remains or traces of past life found in sedimentary rock 29. the closest planet from the sun 30. the turning of the Earth on its imaginary axis caused day and night 31. the trip the Earth makes around the sun once every year 32. the movement of the ocean caused by the gravitational pull of the moon

Down 1. to mix very evenly and separate into particles 2. the weight of the air; a cause of weather 3. to reuse materials 5. rock that contains fossils 6. the careful use of natural resourses 7. the change in a substance from a gas to a liquid 8. the process by which a liquid becomes a gas 9. a resource that can be used up coal, oil, and natural gas 10. energy from the sun 13. the process of dropping sediment in a new location 18. the thin layer of air between Earth's surface and space 19. a movement and shaking of the Eargh caused by shifting of the Earth's plates 22. the carrying away of rock or soil by wind, water, or ice 24. the condition of the atmosphere at a certain place and time 25. caused by the revolution and the tilt of the Earth on its axis 26. the force that caused attraction between objects that have mass 27. the curved path around an object, the planets follow around the sun 28. a crackin the Earth where Earthquakes occur