Fossils Flashcards
1
Q
What are fossils?
A
Remains of plants and animals
2
Q
What can fossils tell us?
A
how much/little an organism has evolved
3
Q
How do fossils form by gradual replacement?
A
(most common)
Teeth,bones,shells don’t decay easily and eventually are replaced by minerals as they decay forming rock like substances.
4
Q
How do fossils form from casts and impressions?
A
Sometimes fossils form when an organism is buried in a soft calm material which hardens leaving a cast of its self which is called an impression
5
Q
How do fossils form from preservation?
A
in amber as there is no oxygen or moisture so things can’t survive
In glaciers it is too cold to decay
peat bogs are to acidic
