Fossils

2. some insect fossils are trapped in this rock made from tree sap. (5)
5. sediment which is most likely to preserve a fossil (3)
7. a fossil that looks like a spiral or ram's horns (8)
8. biological sedimentary rock formed from plant remains (4)
11. The kind of rock that you are most likely to find fossils in (11)
12. _____ fossils include footprints, burrows or droppings (5)
15. science of studying ancient life (12)
17. preserved in hot, dry conditions (9)
18. ____ wood. A permineralised piece of wood. (9)
19. The process of exchanging the remains of an animal or plant with minerals (17)

1. preserved in snow or ice (6)
3. Sedimentary rock formed from sand deposits (9)
4. famous meat-eating dinosaur Tyrannosaurus _____ (3)
6. not preserved
9. sedimentary rock formed from deposits of shells (9)
10. what creatures did dinosaurs evolve into? (5)
11. sedimentary rock made from clay deposits (5)
12. extinct marine arthropod, which has a distinctive fossil (9)
13. most likely cause of extinction of dinosaurs (8)
14. cavity in the rock that shows the shape of the hard parts of a fossil. (5)
16. kind of fossil where an animal or plant leaves an imprint in the mud