What is a Fossil?
A fossil is an organism, creature, plant or burrow that lived millions of years ago. Fossils have the same density as rocks and weigh roughly the same. Fossils are preserved in rock or clay. The first form of life evolved 4 billion years ago, but the first visible life was 2 billion years ago. Life on land first appeared 380 million years ago. Igneous is a name for volcanic rocks, you will not find Fossils in these rocks.
What do fossils look like?