History+of+Life+on+Earth+Study+Guide

Evolution - Chapter 7 - History of Life on Earth

What you need to know for the test:
 * 1) Explain how fossils can be formed and how their age can be estimated.
 * 2) Differentiate between absolute and relative dating.
 * 3) Describe the geologic time scale and the way that scientists use it.
 * 4) Describe two things that might cause a mass extinction.
 * 5) Compare two ways that conditions for life on Earth have changed.
 * 6) Outline the major developments that allowed life to exist on Earth.
 * 7) List the four eras of the geologic time scale in order.
 * 8) Describe the major types of organisms that arose during the four major divisions of the geologic time scale.
 * 9) Describe two characteristics that all primates share.
 * 10) Describe three major major groups of hominids (Australopithicenes, Neanderthals, Homo (habilis, erectus, sapiens)).
 * 11) Describe what makes humans unique.