Across
- 2. Name of molten rock when it has reached the surface of the earth
- 4. Relative dating principle that says rocks are older the farther down they are
- 6. The placing of small rocks or sediment at the bottoms of oceans and lakes
- 8. Name of the era in which the number of animal species "exploded"
- 9. In addition to heat the other component that helps form Metamorphic rock.
- 14. Atomic particle that moves around the nucleus that determines how the element reacts with other atoms
- 16. Geologic feature in the ocean where two tectonic plates diverge
- 18. Term used to describe a radioactive element changing into a stable one
- 21. What an element is called if it emits (throws out) nuclear particles
- 24. Major rock type formed by the solidification of molten (melted) rock
- 26. Geologic feature that occurs where two continental plates converge
- 28. Atomic particle in nucleus that determines what if it is an isotope (stable) or not
- 32. Geologic feature that occurs where one ocean tectonic plate converges into a continental one
- 33. _______ horizontality says that sediment layers are formed nearly horizontal
- 34. What the layers in Sedimentary rocks look like compared to metamorphic.
- 35. The squeezing of rocks underground by the layers of rocks above them
- 38. Sharp break in layers that is younger than the layers it cuts through
- 39. Center of an atom where the Protons and Neutrons reside
- 40. Name of the eon in which the Earth first had life, started creating oxygen, and started having continents
- 45. The amount of time it takes half the radioactive atoms in a sample to decay into stable ones
- 46. Visible in Igneous Extrusive rocks. Makes them jagged. From gas escaping.
- 47. The wearing away of a rock by the elements
- 48. Atomic particle in nucleus that determines what element it is
- 50. Visible in Igneous Intrusive rocks. Gives them their speckled appearance.
- 51. An imprint or dead body of an ancient living organism
Down
- 1. An element that has already decayed into a stable form
- 3. Dating method that gives an actual approximate time
- 5. The transportation of small rocks by wind and water
- 7. When tectonic plates smashed into each other
- 10. Rocks formed from the accumulation of smaller rocks squeezed together layer by layer
- 11. The joining of sediment by mineralization "chemical glue"
- 12. A radioactive isotope before it has decayed into a stable element
- 13. Dating method that only indicates what event occurred before or after another event
- 15. Name of the eon in which the Earth was created and was a hot molten mess
- 17. Igneous sub type of rock formed by Magma solidifying below the surface of the earth slowly
- 19. Geologic feature that occurs in the ocean where two tectonic plates converge
- 20. Plate _________. Theory that the continents move because the molten layer they rest on circulates on convection currents and drags them with it
- 22. Relative dating principle that says whatever crosses through layers is younger then the layers it crosses through
- 23. Igneous sub type of rock formed by Lava solidifying on the surface of the earth quickly
- 24. Relative dating principle that says that whatever rocks are trapped in solidified magma/lava is older than the magma/lava that trapped it
- 25. Name of the gas that protects Earth from the sun's radiation
- 27. Technical term for "forming wavy ribbon-like layers"
- 29. An atom with more excess (too many) Neutrons and is unstable
- 30. Name of molten rock when it is under the surface of the earth
- 31. What the layers in Metamorphic rocks look like compared to sedimentary.
- 36. Name of the eon in which the Earth first had multicellular life and its first supercontinent
- 37. Rocks formed deep underground by heat and pressure
- 41. ________ drift. Theory that the continents of the Earth moved around
- 42. When tectonic plates are ripped apart
- 43. When tectonic plates dragged past each other
- 44. Geologic feature that occurs where two tectonic plates on land diverge
- 49. Formed by dead animals exposed to immense heat and pressure for hundreds of millions of years
- 50. Formed by dead plants exposed to immense heat and pressure for hundreds of millions of years