Types of Fossils
As the process of living things dying, decomposing, and becoming part of the earth, these can be formed
_______ are formed when the remains of living things go through a change into stone.
Fossils
The most ancient fossils found so far are over _____ years old.
3.45 Billion
What type of living things make good fossils?
Living things with bones or other hard structures like branches.
A fossil can only form if ....
An animal or plant is buried soon after death.
Fossils tell us information about what life was like when?
In the past / many years ago
Shells, bones, or teeth that have been turned into stone are what type of fossil?
Petrified
Once the living thing is buried, parts of the organism are slowly replaced with _______ dissolved in underground water.
Minerals
True or False: Fossils show us how some animals have changed over time.
True
Some fossils are found in ______, tar, peat, or ice.
Amber / Tree Sap
The minerals and mud or sand then turns into ___.
Stone / Rock
True or False: Earth's surface has not changed at all over time.
False
Footprints imprinted into mud and then hardened into stone is an example of a _____ fossil.
Mold
Fossil creation usually takes how long?
Millions of years
According to the chart in your notes, how have horses changed over time?
They have gotten larger, they now have hooves instead of toes