Eras of earth's history Flashcards
Animals that have hair and produce milk for their young
Mammal
Evolved from lungfish
Amphibian
An animal with a backbone
vertebrate
animal with strong legs, eggs with thick shells
Reptile
Age of mammals
Cenozoic Era
Vertebrates evolve
Paleozoic
Age of reptiles
Mesozoic era
When did reptiles first appear?
Late paleozoic
What Era did pangaea form?
Paleozoic Era
When did the mass extinction of Dinosaurs occur?
end of cretaceous period
What was the probably cause of two mass extinctions?
The probable cause for the mass extinction at the end of the Permian period is climate change. The probable cause for the mass extinction at the end of the cretaceous period was when an asteroid struck earth.
Successful animal group that lived in the Mesozoic era?
Dinosaurs
Name for the time in earth’s early history that accounts for 88% of earth’s time, but onely cellular organisms lived.
Precambrian
A record of the geologic events and life forms in Earth’s history.
Geologic time scale
an ___ is a spam of time marked by character, events, changes on earth, etc.
Era
