Triassic Period
The first dinosaurs appeared in what time
Jurassic Period
When large dinosaurs lived on Earth
Gondwanaland
The southern part of Pangea is known as
Cenozoic
The era of recent life
Break Up
Life forms became isolated when the continents began to
False
True or False: 10,000ya dinosaurs became the dominant land animal
Humans
Early (???) may have caused the extinction of some other animals
Fish
One of the most important fossils for determining age from the Palezoic era is what
...
True or False: The next smaller division of geological time after the era is epoch
Precambrian
Which era in the geological time scale lasted the longest?
Precambrian
Which era is the oldest
Stromatolite
What is thought to be one of the earliest forms of life on Earth?
Oxygen
What appeared in the atmosphere that allowed more complex organisms to develop?
Reptiles
What kind of animals developed near the end of the first era?
Mesazoic
What name was given the second of Earths eras?
Lava
What covered most of Earths surface at the beginning of the second era
Reptiles
What familiar marine life form evolved during this era
Amphibians
What type of animal evolved that lived out of water but reproduced in water
Appalachian
What mountain chain was caused by the collision of the Eurasian or African continental plates with the North American plate?
Reptiles
What type of animal is thought to have developed after the evolution of an egg that would not dry out on land?
Coal
The formation of swamp vegetation are the bald for what fossil fuel?
4.56 billion years ago
How old is Earth?
Precambrian
Which span of geological time spans covers about 88 percent of Earths history?
Oxygen
Which of the following gases was NOT part of Earths original atmosphere?
Green Plants
What is the major source of free oxygen in the atmosphere?
Iron
According to the Precambrian rock record, much of Earths first free oxygen combines with what?
3.5 Billion Years
How far back does the fossil record extend?
Stromatolites
The most common Precambrian fossils are layered mounds of calcium carbonate called what?
Paleozoic
Which era immediately follows the Precambrian
540 Million years ago
When did abundant fossil evidence first appear in the geological time record?
Fused into Pangea
What happened to all the continents by the close of the Paleozoic?
Seas
In the early Paleozoic, life was restricted to the what?
Hard Parts
What appearance in animal evolution marked the beginning of the Cambrian?
Mantle Plume
What event may have triggered the great Paleozoic extinction?
Protect
Hard parts helped animals to (???) themselves
Mesozoic
During which era did the supercontinent Pangea began to begin to break up?
Pacific Plate
The Rocky Mountains began to form as the North American plate overrode which plate?
Dinosaurs
What animals dominated the Mesozoic Era?
Reptiles
What were the first true terrestrial animals?
Dinosaurs
Which animals did NOT survive the Mesozoic extinction?
Meteorite Collision
What likely contributed to the extinction THAY marks the end of the Mesozoic Era?
Quaternary
The current geological period is called...?
Plate Interactions
What caused many events of mountain building, volcanism, and earthquakes in western North America during the Cenozoic?
Above sea level
Throughout the Cenozoic, most of North America was what?
Age of Mammals
Which title best describes the current geological age?