What type of scientist studies fossils and reconstructs the appearance of plants and animals?
An insect trapped in amber is an example of what type of fossil?
What do you call a specific fossil found only in a particular type of rock, in many places worldwide?
Footprints and worm trails are examples of what type of fossil?
What type of fossil is made from a thin film of carbon atoms and molecules?
The principle that the oldest rocks are on the bottom of an undisturbed bed of sedimentary rock layers.
What are gaps in the rock record called?
Matching rock layers in two different areas is called....
What is a common cause of gaps in the rock record?
When rock layers are tilted and younger sediment layers are deposited on top, this is called...
The time it takes for half of the atoms in an isotope to decay is called...
Using the decay rate of carbon to determine the absolute age is called...
What is the principle that states the Earth's processes occurring today are similar to those that occurred in the past?
What is the term for the age of a rock or other object in years?
How old is the Earth?
If two organisms can reproduce, they are members of the same...
What is the process by which organisms with characteristics suited tot he environment survive and reproduce?
Large scale environmental changes such as temperature and climate are often caused by...
What needed to happen for cyanobacteria and green algae to evolve into more complex life forms?
A species must ___________ in response to a changing environment, or it will become __________.
What is the largest division in the geologic time scale?
Humans appeared during which Era?
The Mesozoic Era was known as the Age of the ___________.
An event that wipes out a large portion of the organisms alive, such as at the end of the Permian Period, is known as a ________________.
The very first organisms, _____________, started during the Archean and were adapted to harsh environments.
