Exam 1: Understanding Earth: A Dynamic and Evolving Planet

When the universe originated it was composed of 100 percent ____________________ and but now consists of ____________________ percent hydrogen and 2 percent ____________________ elements.

State the principle of uniformitarianism

How are the rock cycle and plate tectonics related?

Which of the following statements about the asthenosphere is not true?

What is the basic tenet of the theory of organic evolution? What is the mechanism for organic evolution called and how does it work?

The zone between the core and the crust is called what?

Earth's core is probably ____.

In order for geologists to use the Principle of Uniformitarianism to interpret the geologic record,they do not need to study modern geologic processes.

Scientists have proven that there is no supernatural or spiritual realm.

The four basic forces are ____________________,____________________,____________________,and ____________________.

What are planetesimals?

What are two examples of geology-related environmental concerns? Briefly explain why geology holds an important position in environmental science.

How do metamorphic rocks form?

What is one way in which geologic knowledge is used to help humans?

Briefly explain the importance of the geologic time scale.

Geologists use the Principle of Uniformitarianism as a basis to interpret the past and predict the future.

Earth formed ______ billion years ago.

Fossils are ____.

The theory that all living organisms are descendants of different life forms that existed in the past is called ____.

Briefly explain how the themes of plate tectonics,organic evolution,and geologic time provide a cohesive history of Earth.