It is the hollow area in sediment in the shape of an organism
mold
100
It is the preserved remains or trace of a living thing.
fossil
100
It is the most common way that fossils are preserved
sediment
200
It is the copy of an organism where sediment filled in a hollow area left by an organism
cast
200
It is a fossil that turned to stone by mineral replacement
petrified fossil
200
It is another way that fossils can be preserved. It is tree say, or resin, from evergreen trees. It covers the remains, seals it off from the air, and protects it from decay.
amber
300
It means to turn to stone
petrify
300
It is evidence of the activities of an organism
trace fossil
300
It is another way that fossils can be preserved. It can even preserve hair and skin by preventing decay.
ice
400
It is another way fossils can be preserved. It soaks into their bones, preserving the bones from decay.
tar
400
It is a fossil that can be used to tell the relative age of a rock layer because it only existed briefly and was widely distributed.
index fossil
500
It is an extremely thin coating on rock where the weight of sediment squeezed away the remains of an organism.