Fossils quiz

[blank_start]Fossils[blank_end] are preserved remains or traces of living things.

Which one of these is NOT a step in how fossils form?

Why are fossils found in sedimentary rock?

[blank_start]Petrified fossils[blank_end] happen when spaces inside organism are filled w/ minerals from groundwater.

[blank_start]Carbonaceous film[blank_end] is an extremely thin coating of carbon on rock. It is left when gases/liquids given off by body and form an image.

[blank_start]Casts[blank_end] are a copy of the shape of the organism. They're formed when the minerals or sediment fill in space.

[blank_start]Molds[blank_end] are hollow areas or cavities in sediment in the shape of an organism. They're formed when hard parts decays

Which one of these does trace fossils NOT provide evidence of?

Original remains occur if trapped in ______, ______, or _____.

We can use fossils to........

Index fossils are common for a short period of time.

Check all that are an example of an index fossil.