Historical Geology 102
Origin of the Earth Study Guide

After the "Origin of the Earth" lecture and readings you should be able to answer and discuss the following questions.

Who first determined that distant glaxies are either moving towards us or retreating away from us?

How is this rate of approach or retreat measured?

How do we know what type of radiation is being produced by a distant galaxy?

What is the name applied to this technique?

Who first determined the distances to galaxies?

What is a standard candle?

What is the relationship between the rate of retreat and the distance to a galaxy? Draw this relationship in the form of a graph.

Current estimates put the age of the universe at _________________ billion years old.

What were the initial conditions of the universe prior to expansion?

Why are these conditions difficult for us to understand at this time?

What is the name of the theory that currently contains the best explanation for the origin o f the universe?

What were the first and only elements to form after the beginning of expansion of the universe? Approximately when did they form?

Describe the sequence of star formation from the first generation of stars to the present generation.

Which types of stars eventually go supernova?

Why is the process of a star going supernova so important?

How old is the Solar System?

What are the general characteristics of the Solar System?

Describe the Homogenous Accretion Theory of planetary formation.

Describe the Inhomogenous Accretion Theory of planetary formation.

What are the problems associated with each of these theories?