Mass Extinction
What is a mass extinction?
an event during which many types of living things become extinct at the same time
What was the Cambrian Explosion?
An "explosion" of new life where many new life forms appeared in a relatively short time frame.
What prominant reptiles were present in the Mesozoic Era?
Dinosaurs
Did the mammals in this Era struggle or flourish?
They flourished.
Define "Vertebrates" and "Invertebrates"
Vertebrates: an animal with a backbone
Invertebrates: animals without a backbone
How many mass extinctions were there?
Two
How many periods did the Paleozoic Era have?
6
What was the first period of the Mesozoic Era?
The Triassic Period
How many periods does the Cenozoic Era have?
3
What is a mammal?
a vertebrate that controls its body temp and feeds milk to its young.
What caused the second mass extinction?
An asteroid hit earth along with serious volcanic activity.
What two major events occurred in the Permian Period?
The formation of Pangea and the first mass extinction.
How many periods are in the Mesozoic Era?
3
Is The Neogene period part of this Era?
yes
what is an amphibian?
An animal that spends part of its life in water and part on land
What do scientists think caused the first mass extinction?
Volcanoes, Global Warming, and increased CO2 and less O2 in oceans.
What mountain range formed in the Paleozoic Era?
The Appalachian Mountains
When did birds begin to replace flying reptiles?
The Cretaceous Period
When did the ice ages occur?
The Quarternary period.
What are some characteristics of reptiles?
They have scaly skin and they lay eggs with tough, leathery shells.
The Permian Period (The end of the Paleozoic Era)
What lifeforms evolved in the Carboniferous period?
Reptiles and giant insects
When did the Cretaceous Period begin?
145 million years ago.
What 2 mountain ranges were formed in the Cenozoic Era?
The Andes and Himalayas.
What Era is known as the "Age of reptiles?"
Mesozoic Era