Cenozoic
This is the most current Period within the Cenozoic Era.
What is the quaternary period?
The Mesozoic Era was known also by this fitting name.
What is the age of reptiles or the age of dinosaurs?
This period saw the rapid and sudden diversity of organisms in the fossil record.
What is the Cambrian Period - Cambrian explosion?
Changes in this time frame on the Geologic timescale are typically defined by the types of organisms seen in the fossil record as well as shifts in climates and environments.
What are periods?
The mantel is the third outer most layer of the earth and is made up of molten rock. Many Scientists believe its continuous movement is responsible for this foundational theory that helps scientists better understand Earths past.
What is the Theory of Continental Drift?
The Cenozoic era started this many years ago.
What is 66 million years ago?
This period saw smaller reptiles and mammals battling for the same resources.
What is the Triassic Period?
While this period did not see the first land organism, which would have been plants in the previous period, it did see the first amphibians, or partially marine, partially terrestrial organism.
What is the Devonian Period?
This time frame in the Geologic time scale represents a generalized chunk of Earth's past. In our Current Eon, we have three.
What is an Era?
This isotope is most commonly used for dating items that were once living. Its half life is 5,730 years.
What is Carbon-14?
This new ecosystem environment emerged in the Oligocene and Miocene epochs due to the cooler dryer climates emerging at the time.
What are Grasslands?
This group of Dinosaurs was a smaller carnivorous bipedal group during the Jurassic Period that later developed into the apex predators in the Cretaceous period.
What are the Theropods?
This epoch in the Carboniferous period is known for coal forming Forrest and first reptilian organisms showing up in the rock record.
What is the Pennsylvanian epoch?
The Paleozoic Era, Mesozoic Era and Cenozoic Era are all separated by this type of event...
What is a Mass extinction event?
These three pieces of evidence lead scientists to fully investigate the theory of Continental Drift.
1. The continents look like they could fit together like a puzzle.
2. Identical fossilized organisms were found on multiple continents.
3. Matching mountain ranges and rock layers can be found on various continents.
These features separate epochs within the Cenozoic Era.
Climatic shifts, Organism changes in the rock layers, materials of the rock
This organism species was the early ancestor to the dinosaurs during the Triassic period.
What are the Archosaurs?
This period saw a significant rise in oxygen levels due to the extreme amount of plant life and vegetation in terrestrial ecosystems.
This time frame of the Geologic timescale is one of the biggest chunks, and the earliest. It is named after the Greek God of the underworld.
What is the Hadean Eon
A scientist is using radioactive isotope P with a half life of 4,000 years to date a 6mg specimen. The scientist knows 6mg is only 6.25% of its original mass. How many years old is this specimen, and what is its original mass?
What is 16,000 years old and 96mg?
This Major Climatic event repeated throughout the Pleistocene Epoch
What are Ice Ages and/or glacial movement
Other than Dinosaurs, what organisms species evolved to help the food web become more diverse and complex during the Cretaceous Period?
What are Angiosperms (Flowering plants)
The development of this atmospheric Layer allowed life to transition from only marine, to marine and terrestrial. (Underwater and Land)
What is the Ozone Layer
This is the smallest time frame on the Geologic timescale, like looking at minutes in a day when compared to our yearly calendar.
What is an Age?
A scientist finds a rock high in iridium buried far down in the Earths crust, and they think it may be part of a meteorite. The scientist likely uses this radioactive isotope to date the piece of rock.