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Earth's History 5th

5th period Miss Mitchum

QuestionAnswer
Has Geologic time ended yet? No
When will Geologic time end? When all species dies
How old is Earth? 4.6 billion years
What is Precambrian Time? Earliest time in Earth's history
How much of Earth's history does this account for? 80%
How do we break up Geologic time? When the most popular species dies out
What are the three units of time do we use? Era, Period, and Epoch
What is earth's current geo. time go? Cenozoic Era/Quaternary Period/Holiness Epoch
Name the three Eras Paleozoic Mesozoic and Cenozoic
Three details about the Paleozoic Era New life forms, Plants Developed, and First warm blooded reptiles
Three details about the Mesozoic Era Age of reptiles, Flower appeared, and Ended with an asteroid
Three details about the Cenozoic Era Ice age, mountain ranges appeared, and humans appeared
What era was the "Age of Reptiles"? Mesozoic
What era was the "Age of Mammals"? Cenozoic
What era did mammals first appear? Mesozoic
What is an Adaption? A change in an organism that helps survive
What is Variation? Variations among species of similar populations
Natural Selections? Traits be come more or less dominate because of the environment
Artificial Selection? You pick which traits you want to reproduce
What is a Trait? A gene that gets passed down from parent to offspring
What are the two types of factors that change in life forms? Natural and Man Made
Example of Natural Climate change
Example of Man-made Cutting down trees
If an animal is close to extinction is said to be_______. Endangered
What is Extinction mean? A population dies out or doesn't exists anymore
What is believed to have wiped out the dinosaurs? An astreiod hit the earth
Created by: Annelise5
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