group 1
The preserved remains or traces of an organism.
What is a fossil.
The age of a rock compared to other rocks.
What is relative age.
An event in which many types of living things become extinct at the same time.
What is a mass extinction.
A record of the life forms and geologic events in Earth's history.
What is the geologic time scale.
in which era lived the saber toothed cats
ice age
A hollow imprint that shows the shape of an organism.
What is a mold.
Useful fossils that help to tell the relative ages of the rocks around them.
What are index fossils.
which type of volcano is formed from the flow of non explosive lava that steadily builds up
shield volcano
the rigid rocky layer of the earth
crust
super continent
Pangea
An example of this type of fossil would be footprints.
What is a trace fossil.
coal
which type of volcano is formed from explosive eruptions
cinder cone
the thickest layer of the earth
mantle
the dropping of weathered rocks
deposition
A fossil formed when minerals replace all or part of an organism.
What is a petfrified fossil.
A type of fossil fuel that is formed from tiny sea creatures.
oil and natural gas
a break in the earths crust
fault
the process of the rocks breaking apart
weathering
movement of weathered rock from one place to another
erosion
Explain how the Law of Superposition is used to determine the relative ages of sedimentary rock layers. (the oldest layer position)
What is the oldest layer is that the bottom, and each higher layer is younger than the rocks below it.
the point where the earthquake begins
focus (hypocenter)
2 factors that can weather rocks
plants, gravity, water, rain, ice, chemicals, animals
huge sheets of ice
glaciers