fossils Flashcards
1
Q
different ways fossils are formed?
A
whole animals can be preserved in things such as ice or tar
cast or impressions like footprints can be covered in layers of sediment turning them into rock
hard body parts like bones
2
Q
what Fossils can show? 3 points
A
how new organisms arise
how new species are formed
how some species become extinct
3
Q
what factors affect the rate of decay?
A
oxygen levels (low means slower decay)
temperature (low means slower decay)
high soil acidity
