Precambrian Supereon
What’s the name of the hottest eon that was also least likely to host organisms/provide fossils?
The Hadean eon
True or False
Dinosaurs existed within this era.
False
Fill in the blank.
The Mesozoic era is composed of ___ different periods.
Three
The Cenozoic era is the age of…
Mammals and new life.
When did the Precambrian Supereon begin? (In other words, the age of the Earth itself)
4.6 billion years ago
How long ago did the Paleozoic era conclude?
248 million years ago.
Which period within this era ended with the extinction of the dinosaurs?
The Cretaceous period
Which epoch came first? Pleistocene or Holocene?
The Pleistocene epoch came first.
What are the three eons that make up the Precambrian Supereon? List them in order.
The Hadean eon, the Archean eon, and the Proterozoic eon.
Fill in the blanks
The climate of the Paleozoic era was similar to our current climate—with ____ weather and some ____ around the South Pole and ___ weather near the equator
Colder, glaciers, hotter
What are the three periods within this era? List them in order.
Triassic, Jurassic, Cretaceous
What’s the boundary between this era and the era previously called?
The KT Boundary
During the Proterozoic eon, what bacteria caused a change in the Earth’s atmosphere, and changed the carbon dioxide to oxygen?
Photosynthetic Cyanobacteria converted the carbon dioxide into oxygen
In what way did this era conclude?
This era concluded with the mass extinction of more than 90% of marine organisms.
Other than dinosaurs, list three other organisms that dominated the Mesozoic era.
Lizards, Marine Reptiles, and Tortoises
List in order all the seven epochs within this era.
Paleocene, Eocene, Oligocene, Miocene, Pliocene, Pleistocene, Holocene
Fill in the blanks.
____ were some of the most dominant species within the ____ eon—as well as the first to have their fossils found in South Africa and western Australia.
Stromatolites, Photerozoic
What two species were dominant around the end of the Paleozoic era?
Synapsids and Diapsids dominated the paleozoic era around its end.
Describe the climate within the Jurassic period.
Typically warm summers and snowy winters of month-long darkness.
Within the Tertiary period, what sub periods exist, and what epochs exist within each one?
Paleogene and Neogene, with Paleogene containing the Paleocene, Eocene, and Oligocene epochs—and Neogene containing the Miocene and Pliocene epochs.