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 Living Environment: Students understand that cells are the basic unit of life, that all life as we know it has evolved through genetic transfer and natural selection to create a great diversity of organisms, and that these organisms create interdependent webs through which matter and energy flow. Students understand similarities and differences between humans and other organisms and the interconnections of these interdependent webs.
Cells: Students describe how living things are made up of one or more cells and the ways cells help organisms meet their basic needs.
Give examples of organisms that consist of a single cell and organisms that are made of a collection of cells.