How old are you?
Gone too soon
It's been Eons
Dying extincts
Geologists rock!
100
The Geologic Time Scale is a record of ...
the known history of the earth based on rocks and fossils
100
Which layer of rock is newest?
A
100
Saying your grandpa is older than you is an example of
relative dating
100
The preserved remains of plants and animals from the remote past are called
fossils
100
Fossils are most common in which rock types?
Sedimentary
200
What hypothesis can be formed when a fossil is found in older strata, but no longer evident in newer layers of strata?
the species went extinct
200
The end of life for a group of organisms, usually a species, is called ...
extinction
200
What was significant about the "Cambrian Explosion?"
After years of relatively little activity, life seemed to develop quickly
200
Which of the eras covers the longest time period?
Precambrian Time
200
Dinosaurs, small mammals, birds, conifers and flowering plants were found in this era
Mesozoic
300
The name of the "Super Continent" formed during the Paleozoic era was...
Pangea
300
Which era are we currently living in?
Cenozoic
300
Dinosaurs went extinct about ________.
65 million years ago
300
Which fossil would be considered an index fossil?
A
300
Which of these is the MOST exact way of finding the exact age of rocks and fossils?
Absolute Dating
400
What is the correct order on the geological time scale?
eon, era, period, epoch
400
Scientists who work together to uncover and analyze fossils and study the Earth's surface are called ______ and _______.
Geologist and Paleontologist
400
In which era was the earth, moon, rocks, and oxygen formed?
precambrian time
400
What do scientists think the first life form was?
Bacteria
400
What is the correct order from oldest to youngest? 
ABC
500
Law of Superposition states that....
the oldest layers are found on the bottom and the youngest on top
500
List the 4 eras, beginning with the oldest one.
Precambrian Time, Paleozoic, Mesozoic, Cenozoic
500
Which era ended with the largest mass extinction known as the Great Dying?
Paleozoic
500
The boundaries between _______ seem to coincide with major changes in the life forms present on Earth.
Eras
500
What are the 4 main characteristics of index fossils?
they are easily recognizable, abundant, large geographic distribution, lived a short time