science

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Across
  1. 5. Denoting rock that has undergone transformation by heat, pressure, or other natural agencies.
  2. 6. Cylce: An idealized cycle of processes undergone by rocks in the earths crust.
  3. 7. marks: wavy riges and furrows left on and or mud left by water or wind
  4. 8. Record: Number of fossils that have been discovered and information gathered from them.
  5. 10. the process by which organic matter is exposed to minerals over a very long period of time and then turns into a stony substance.
  6. 12. age: is an approximate age in archaeology and geology.
  7. 13. relationships: an igneous intrusion is always younger than the rock it cuts across
  8. 15. A rock having solidified from lava or magma.
Down
  1. 1. A rock that has formed from sediment deposited by water or air.
  2. 2. the theory that changes in the earths crust during geological history
  3. 3. a break in the geologic record created when rock layers and reoded or when sediment is not deposited for a long period of time
  4. 4. dating: when methods are used to determine if an event is older or younger than other events
  5. 9. fossil: A fossil that is usful for dating and correlating the strata in which it is found.
  6. 11. the way in which a whole or mixture is made up
  7. 14. A solid mineral material forming part of the surface of the earth, very hard.