In 500 to 1500 words or less discuss the following:

What is the difference between minor and mass extinction events? How many mass extinction events have occurred in Earth’s history. What types of environments and/or ecosystems were most affected during each of these extinction events? What notable major or minor groups went extinct due to each mass extinction event? Discuss how major extinction events affect the following: (1) the evolution of life; and (2) the divisions of the geologic time scale.