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The study of minerals is called

The foundation of the science of geology rests on James Hutton’s theory of __________, which states that the present is the key to the past and provides the basis for the rock cycle model, a series of events through which rocks change over time.

Which occurrence is associated with the demise of the dinosaurs?

The sedimentary rock known as ______________ consists of angular pebbles cemented together by silica, calcium carbonate, or iron oxide.

Starting with a sample of pure parent radionuclide, what would be the ratio of the parent radionuclide to its daughter after one half-life has elapsed?

The scientific method begins when natural phenomena are ___________ and questions arise about how or why these phenomena occur.

An example of a sedimentary rock is

Which of the following is not a feature of a good index fossil?

The process of matching up rock layers in different localities by such means as index fossils is called

The four seasons-spring, summer, fall, and winter-are caused by the Sun’s changing its daily altitude over a period of 1 year. The Sun’s altitude changes because __________.