Across
- 2. all diatomic elements
- 6. country of the oldest dig
- 7. the quantity of matter contained in an atom of an element
- 12. entire organism gets trapped in ice, tar, and amber
- 13. hallowed out the formation of the organism
- 14. has a positive charge
- 17. man-made gasses
- 22. abosrbs ultra violet radiation from the sun
- 25. atoms with a charge
- 27. the remains of plants and animals that lived long ago
- 28. ichno fossil
- 31. has a negative charge
- 32. an element that will combine with it's self to be stable in nature
- 35. solid form of fossil fuel
- 37. can't make more
- 38. when there is no energy left in the substance
- 40. Cl + O3 and ClO + O
- 44. greenhouse affect
- 45. turned to stone
- 46. methane,CO₂,CO,NO₂
Down
- 1. a cavity formed by cutting, digging, or scooping by archeologist
- 3. fossil fuel in gas form
- 4. measuring tape, toothbrushes, dental picks, screens, turkey basters
- 5. fingerprint
- 8. separates the gases and pulls atoms apart in the compund
- 9. protons,neutrons,electrons
- 10. study fossil
- 11. enegry added to gas.(state of matter)
- 15. fossil fuel in liquid
- 16. 3d x-rays from many 2d x-rays
- 18. the warming of the planet faster than nature
- 19. definate shape and volume.(state of matter)
- 20. uses radiowaves
- 21. 2 or more elements that equal a charge
- 23. the amount of time needed for the sample to reduce it's mass by half
- 24. country of the oldest dig
- 26. has no fixed shape or volume.(state of matter)
- 29. neutral
- 30. radio active decay to determine the specific age of the substance
- 33. ch₄
- 34. the deeper the older
- 36. has no fixed shape but definate volume.(state of matter)
- 39. teeth, skull, arm bones
- 41. formed by filling in the mold fossil
- 42. layer of ozone in the atmosphere is almost gone
- 43. 2 or more elements that equal no charge