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Science Quiz SAS 1

Tested sometime...in the next few days

QuestionAnswer
500 million years ago, what happened? -Earth Formed -Oldest Rock -Fossil evidence of first life
250-500 million years ago, what happened? -Appalachian Mountains began to form -Fossil evidence of first land plants -Fossil evidence of first reptiles
50-250 million years ago, what happened? -Age of reptiles -Dinosaurs became extinct
Less than 50 million years ago, what happened? -Yucca mountain formed -Fossil evidence of first modern humans (homo sapiens)
What is the first step in natural selection? Overproduction: More offspring produced rather than will survive
What is the second step in natural selection? Genetic Variation: There is a natural variety among members of a species
What is the third step in natural selection? Struggle to survive: There is competition for food, shelter and water. Not all survive
What is the fourth step in natural selection? Successful reproduction: Animals best able to survive will reproduce
What was Charles Darwin's theory? Natural selection, it takes a long time and many generations to adapt.
What was Lamarck's theory? Traits were inherited in the parent's lifetime, a short period of time, one generation.
Make sure you can explain Lamarck and Darwin's theories. :)
Created by: Eugenius
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