Earth History

2. The remains of plants, animals and other organisms are converted into a carbon or carbon-containing residue
7. the concept that the earth's surface was shaped in the past by gradual processes, such as erosion, and by small sudden changes, such as earthquakes, like the processes we see today rather than by sudden catastrophic acts
8. Fossils that are used to define and identify geologic time periods
10. Formed when an object is placed into soft mud and is removed by decomposition or physical sources
11. Formed when a mold fossil fills up with sediment; three dimensional

1. A plant, animal or other organism that is perfectly preserved for many years
3. Rock formations from magma that cools and solidifies within the crust of the planet
4. Evidence of plants, animals, and other organisms in the form of preserved footprints, tracks, burrows, borings, and feces left behind
5. “Turned to stone”, a fossil in which minerals replace all or some of an organism.
6. Rock formations from magma that cools and solidifies above the surface of the crust
9. A break or fracture in the ground that occurs when the Earth's tectonic plates move or shift and are areas where earthquakes are likely to occur.