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