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The fossil record contained in Cenozoic rocks is more complete because ____.

What theory proposes that the same processes seen today have operated throughout geologic time (i.e. the present is the key to the past)?

Harry Hess originally proposed the idea of continental drift.

During which type of evolution do distantly related species develop similar characteristics?

Earth was a hot, barren, waterless planet during the early Hadean eon.

The nucleus or foundation of a continent, formed during the collision and accretion of volcanic islands, is called a ____.

The Moon formed during the Big Bang. 

What is the largest eon in geologic time? 

During the Hadean, volcanic island arcs collided and formed:

Relative dating of geologic events was not possible before the discovery of radioactivity in the late 19th century.