A fossil is the preserved remains or impressions of a plant, animal, or other organism from a past geological age. Fossils are typically found in sedimentary rock and provide important clues about the past.
How are Fossils Formed?
Fossils are formed through a process called fossilization. This occurs when living organisms or their remains are buried in sediment. Over time, the organic material is replaced by minerals, creating a fossil.
Types of Fossils
There are several types of fossils, including:
Body fossils: These are the actual remains of an organism, such as bones, teeth, or shells.
Trace fossils: These are evidence of the activity of ancient organisms, such as footprints, burrows, or coprolites (fossilized feces).
The student demonstrates an understanding of how science explains changes in life forms over time, including genetics, heredity, the process of natural selection and biological evolution by showing the relationship between physical characteristics of Alaskan organisms and the environment in which they live.