general science

3. and extinct fish with boney plates instead of scales
6. belief that rocks formed slowly over millions of years by yearly cycles of flooding and drying
9. a species that has no living members
11. layers of rock laid down in layers of mud clay sand and silt
13. remains preserved by tar or decomposing swamp materials
14. preserved remains of living organisms
15. ` ancient water living arthropods similar to pill bugs
17. remains of a living thing kept very cold
18. a rock formed within a mold after the organism has decomposed

1. is the preservation of an organism through dehydration
2. when the organic matter is crushed between layers of rock and leaving a 2-d imprint of it
4. belief that rocks formed by quick violent geographical changes in shorter periods of time
5. a fossil made when an organism is trapped in tree sap which hardens into amber
7. petrified tree sap
8. the imprint of an organism in the layers of rock above and below it
10. fossil a single fossil that extends through multiple levels of strata
12. All the fossils discovered
16. layers of sedimentary rock